Fellow students or disciples who studied under the same master smith; swords showing similar characteristics.

Mountings without a tsuba (guard), typically for tanto.

A wickerwork or basket-weave pattern used in decorative metalwork and lacquer designs.

Red lacquer.

Red wood; reddish-colored wood used in sword fittings or storage.

Temple name; may refer to a specific location or school associated with sword making or martial arts.

A Bitchu Province school active from late Heian through Nanbokucho. Known for chirimen-hada and refined workmanship.

Authentication certificate for Aoe school blades; formal attribution to this Bitchu Province tradition.

Blue shell; abalone or similar iridescent shell material used for inlay decoration.

Blue metal; copper-rich alloy with distinctive blue-green patina used in fittings.

Hollyhock crest; three-leaf design associated with the Tokugawa family.

Hollyhock leaf-shaped design motif, often used in decorative metalwork and family crests.

Hollyhock-shaped mokko design; a four-lobed decorative motif often used on tsuba and fittings.

Hollyhock crest design; the Tokugawa family mon frequently used on sword fittings.

Hollyhock crest shape; tsuba form based on the Tokugawa family mon.

Hollyhock crest; the Tokugawa family emblem.

Blue-gold alloy; a copper-gold mixture producing a bluish metallic color for decorations.

Fan-shaped form; describes a widening curved shape in blade geometry or fittings.

Coarse, rough nie particles; large martensite crystals visible as bright points in the hamon.

Hailstone pattern; small round nie formations in the hamon resembling hail.

Storm-like ground texture; turbulent, swirling patterns in the ji-hada steel grain.

Light blue-green color; pale blue lacquer finish often used on scabbards.

Legs; short lines extending from the hamon toward the edge.

The side or area where ashi (legs) extend from the hamon toward the cutting edge (ha).

Metal fittings attached to a scabbard (saya) for securing cords, including kurikata, kaeshizuno, and uragawara.

Bubble method; describes a pattern or technique creating bubble-like formations.

A prestigious Yamashiro school in Kyoto, active from late Heian through Kamakura. Known for refined tanto and elegant workmanship.

Zigzag cedar pattern; decorative groove pattern resembling chevrons or herringbone.

Wavy, chevron or zigzag grain pattern, characteristic of Gassan school.

Going down to the east; refers to swordsmiths who traveled from Kyoto to eastern Japan.

Plectrum shape; describes a paddle or fan-like form, often referring to tang or fitting profiles.

Horse equipment or tack; sometimes refers to military equipment associated with mounted warriors.

Duty smiths; swordsmiths who worked in rotation for feudal lords or temples.

Guard duty temper; a type of hamon pattern associated with practical military blades.

Bitchu Province; a region in present-day western Okayama Prefecture, home to the Aoe school.

Sword school from Bitchū province known for distinctive blue-tinged steel and hamon patterns.

Bizen Province; a region in present-day southeastern Okayama Prefecture, the most prolific sword-making province.

Colloquial Western term for Koshu Tokubetsu Kicho papers, which had a blue cover. Unlike green/white papers, blue papers were issued by the central NBTHK authority in Tokyo, not the provincial branches where authentication scandals occurred. More reliable than other Kicho-era papers but still not up to modern Hozon standards in rigor. See: koshu-tokubetsu-kicho.

Rod or staff; straight linear element in design or construction.

Single straight groove.

Straight, bar-like utsuri parallel to the blade.

Sanskrit characters; Buddhist seed syllables.

The temper pattern in the kissaki (point) area.

Peony flower motif carved as decoration on sword blades, symbolizing honor and wealth.

Monk or bald; describes plain, undecorated features on swords or fittings.

Monk-style finish; a plain, undecorated mounting or blade treatment.

Traditional Japanese unit of length equal to approximately 3.03 millimeters or one-tenth sun.

Classical court dance and music tradition that influenced decorative motifs on swords.

A large, elaborate clove-shaped hamon pattern characteristic of certain sword schools.

A temple or institutional name that may appear in sword inscriptions or documentation.

Military use; refers to swords made for actual combat rather than ceremonial purposes.

Flowing attachment; describes how decorative elements are applied or flow on fittings.

Beginning work; the initial stage of sword forging or the commencement of construction.

Ground spots; irregular markings or blemishes in the steel surface of the blade.

Ground reflection core; refers to the central steel showing ground-like reflective properties.

Ground reflection; subtle light reflection pattern visible in the steel's surface grain.

Small knife or utility blade, often carried as an accessory to the main sword.

Gleaming dark lines in the ji (surface) caused by nie activity along concentrations of carbon/steel from folding.

Chikuzen Province; a region in present-day Fukuoka Prefecture, home to the Samonji school.

Dust or small particles; fine specks in the steel or hamon activity.

Scattered pattern; describes dispersed or randomly distributed elements in the hamon or hada.

Crepe-like texture resembling silk fabric; refers to fine wrinkled surface patterns.

Crepe-like texture, fine and tightly packed grain with a slightly rough appearance.

Oil staining pattern in the steel surface; natural darkening that occurs over time.

Even or regular; describing uniform, consistent patterns or measurements.

Clove-shaped pattern resembling the clove spice bud.

Ashi (legs) extending from a choji (clove-shaped) hamon toward the cutting edge.

Clove-shaped hamon pattern with rounded protrusions resembling clove buds.

Clove-influenced; hamon patterns that tend toward or resemble chōji formations.

Clove-shaped heart; the core pattern within chōji (clove) shaped hamon formations.

Irregular clove pattern.

Clove-shaped reflection; irregular bright areas in the steel resembling clove flower patterns.

Straight hamon; a temper line that runs in a relatively straight, unvarying pattern.

Straight sword construction; blade made in the style of ancient straight swords.

Overall balance and harmony of a blade's proportions, curvature, and aesthetic qualities.

Korean; refers to Korean-influenced sword styles or imported Korean blades.

A medium-sized point, the most common size.

Medium-width straight temper line; a suguha pattern of moderate width.

Day-night ground finish; a contrasting surface treatment showing different textures or colors.

Medium curvature; a moderate degree of sori (curve) in a blade's profile.

Substitute signature; a signature carved by someone other than the original smith, often by students or followers.

The paired long and short swords (katana and wakizashi) worn together by samurai.

A masterwork or major work; a sword of exceptional quality representing a smith's finest craftsmanship.

Complete amateur or novice; someone with no knowledge of sword appreciation.

Price or payment; the monetary value or cost of a sword or sword work.

Master metalworker; title for highly skilled craftsmen specializing in sword fittings.

Substitute signature; a signature carved by someone other than the original smith.

Feudal lord; provincial ruler.

A sword made by a student or assistant but bearing the signature of the master smith. The work is executed by proxy while carrying the master's name.

A matched pair of long and short swords (katana and wakizashi), symbol of samurai status.

Matched pair of long and short swords (katana and wakizashi) worn together by samurai.

Mounted or fitted with a base; refers to items attached to stands or platforms.

Combined utsuri; a blade showing more than one type of utsuri reflection, typically bo-utsuri and midare-utsuri appearing together. Characteristic of Aoe school work.

Clustered clove-shaped hamon pattern resembling dumplings on skewers.

Protruding menuki; handle ornaments that extend prominently from the tsuka wrapping surface.

In and out; describes irregular or undulating patterns in hamon or other features.

The overall quality or workmanship of a blade; how well a sword is made.

Quality grade; classification system rating the technical execution and artistic merit.

Protruding round; a convex or bulging curved shape in blade geometry.

Protruding menuki; grip ornaments that project prominently from the handle wrapping.

Attributed to; traditional attribution without certainty.

Transmission or inheritance; refers to the historical lineage and provenance of a sword through generations.

Traditional transmission of knowledge, techniques, or attributions passed down through generations.

Single-pronged vajra motif from Buddhist iconography, used as decorative element on fittings.

Vajra sword; Buddhist ritual implement carving combining sword and thunderbolt symbolism.

Copper-colored grain or patina; metallic surface texture resembling copper.

Cut through to the platform; a tameshigiri (cutting test) term inscribed on the nakago indicating the blade cut completely through the test target and into the earthen platform beneath.

Court cap shape; a boshi pattern resembling the traditional Japanese nobleman's hat.

Echizen Province; a region in present-day Fukui Prefecture, known for Shinto-era smiths.

Steel or metal from Echizen province; refers to iron/steel materials sourced from this region.

Branch chrysanthemum; decorative pattern featuring chrysanthemum flowers on branches.

Branched chrysanthemum crest; a family mon featuring chrysanthemum flowers with stems.

Edo period (1603-1868); the era of peace under Tokugawa rule, when Shinto and later Shinshinto swords were made.

Favorable wind; a poetic term sometimes used in sword inscriptions or names.

Imperial guard tachi; ceremonial swords used by palace guards, typically featuring elaborate decoration and fittings.

Decorated leather; painted or embossed leather used in sword scabbard coverings.

A Higo Province school active from Kamakura through Muromachi. Known for Yamato-influenced work.

Flame-jewel blade; hamon pattern resembling flame-like projections with rounded elements.

Etchu Province; a region in present-day Toyama Prefecture, home to the Norishige line.

Style or manner; often used to describe artistic characteristics resembling a particular school.

The collar at the base of the handle, next to the guard.

Matching set of collar (fuchi) and pommel cap (kashira) fittings for the handle.

The fuchi and kashira as a matched set.

Immovable; Buddhist deity often depicted in horimono, representing unwavering determination.

Flute-wrapped; describes a spiral or helical pattern resembling bamboo flute binding.

Wisteria; decorative motif featuring wisteria flowers commonly used in sword ornamentation.

Mount Fuji shape; a blade profile or hamon pattern resembling the mountain.

Revival theory; movement advocating return to classical sword-making techniques and aesthetics.

The curve of the cutting edge in the kissaki area.

Withered or diminished fukura; reduced curvature at the tip area of the blade.

Flat or diminished fukura; when the blade's cutting edge curve is minimal or absent.

Blister; a raised area caused by forging flaw.

A metal rim or border.

Bag or pouch; also refers to袋樋 (fukuro-hi), a type of groove with rounded ends.

Bag-shaped chōji hamon pattern with rounded, enclosed clove-like formations.

Complex or compound style; refers to elaborate construction methods or decorative techniques.

Stepping in; refers to aggressive cutting technique or deep penetration in testing.

Boat shape; a nakago (tang) shape with a curved profile resembling a boat's hull. Characteristic of Soshu tradition, especially Sadamune.

The tapering of the blade from base to point, giving a sturdy appearance at the base.

Swinging-sleeve shape; a nakago (tang) shape with curved, flowing contours resembling a kimono sleeve. Common in Rai school and Soshu tradition works.

Kimono-sleeve shaped tang; a nakago with a distinctive curved profile resembling the flowing sleeve of a furisode kimono, with strong curvature toward the mune. Found on Kamakura tanto.

Old attribution; historical sword appraisal or authentication, often from earlier periods.

Old or antique scabbard, often referring to historical saya with patina and wear.

Old house forging; a traditional smithing method or school designation.

Tassel-like feeling; a soft, flowing quality in the blade's appearance or hamon.

The inner core or central portion of a tsuba, especially in sukashi openwork designs.

Lack of faith or confidence in a sword's authenticity or attribution.

Unknown or unclear; used in documentation when details cannot be determined.

Two-character signature; a brief inscription consisting of only two kanji characters on the nakago.

Two parallel grooves of different lengths carved into the blade, creating a staggered or offset pattern.

Double groove; two parallel grooves.

Two parallel grooves carved into the blade surface, typically running along the length of the blade.

Thick groove; a wide, deep fuller or blood groove carved into the blade.

Elegant single horn design, typically referring to a refined unicorn or single-horned creature motif.

External damage or defects on the blade surface or structure.

Framed signature; the mei portion cut out and inset.

Collaborative work between multiple craftsmen, often a master and student working together.

Modern traditionally-forged sword; blades made by smiths after 1876 using traditional tamahagane and forging methods. Distinguished from showato (non-traditionally made military blades).

The Mongol invasions of Japan (1274, 1281); historically significant period for sword development.

False or fake signature; a fraudulent inscription added to misattribute a blade to a famous smith.

Silver coloring technique; decorative metalwork using silver to create designs on fittings.

Silver polished ground; a mirror-bright silver finish achieved through careful polishing and burnishing techniques.

Silver polishing flow; hamon treatment creating silvery, flowing appearance in the temper line.

Silver floating; a silvery appearance or reflection on the blade surface.

Silver inlay.

Silver brocade wrapping or covering used on sword accessories.

Art name or pseudonym; an alternative name used by swordsmiths or artists.

Imperial gift swords; blades given as presents by the Emperor or imperial family.

Imperial smiths; the select group of master swordsmiths summoned by retired Emperor Go-Toba in the early 13th century to forge swords under his personal instruction at the imperial court.

The Five Traditions; the main sword-making schools (Yamashiro, Yamato, Bizen, Soshu, Mino).

Ritual chopsticks; Buddhist implements used in fire ceremonies.

Imperial paulownia crest with five and three leaves; common decorative motif.

Rural samurai; lower-ranking warrior class who lived in countryside rather than castle towns.

Magnificent and robust quality; describing blades with powerful, impressive appearance and structure.

Famous family lineage of metalworkers serving the Tokugawa, renowned for kozuka and menuki.

The five-piece matching set consisting of tsuba, fuchi-kashira, kozuka, kogai, and menuki.

Colloquial Western term for Tokubetsu Kicho papers (pre-1982), which had a green cover. Treat as equivalent to no papers—approximately 95% of attributions are unreliable. Exception: low-value fittings from inexpensive schools where modern Hozon certification costs exceed the value gained. See: tokubetsu-kicho.

Undulating hamon with regular, repeated rounded wave-like peaks resembling a series of semicircles.

Flame-like projections extending from gunome (irregular wave) hamon into the blade.

Combined gunome and chōji pattern; irregular peaks mixed with clove-shaped formations.

Complex hamon combining irregular waves with clove-shaped and random elements.

Predominantly gunome pattern; hamon where irregular waves dominate the design.

Having the essence or tendency of gunome; irregular wave-like hamon pattern.

Irregular gunome pattern.

Reverse hook; a hamon pattern element that curves backward against the normal direction.

Reverse or contrary curvature; abnormal bending opposite to proper sword geometry.

Reverse ear; an inverted or backward-facing rim or edge detail.

Reverse large diagonal file marks on the tang, opposite to standard direction.

Reverse chisel marks; file marks on the tang running opposite to the normal direction.

Reverse or inverted orientation; upside-down positioning of design elements.

Imperial treasures; swords and artifacts in the Japanese Imperial collection.

Semi-cursive script; flowing calligraphy style between block and cursive writing.

Semi-cursive style; a calligraphic term applied to flowing, intermediate patterns.

The cutting edge; also the hardened area of the blade.

The rising of the cutting edge; refers to the upward curve or lift of the blade's edge.

Chestnut shape with the edge side higher.

Edge-rising feeling; the visual effect of the hamon appearing to lift or rise.

Chestnut-shaped end with the edge side higher; a rounded nakago-jiri variant.

Blade length measurement from the tip to the habaki notch.

Edge staining or discoloration of the blade's cutting edge from use or age.

The notch on the cutting edge side.

Within the edge; refers to the area or activities within the cutting edge region.

Nie in the hardened edge area.

Blade king; an honorific term for an exceptional or supreme quality cutting edge.

The side of the tang where the edge faces outward.

The side of the tang where the edge faces inward.

Wide blade; describes a blade with a broader width than standard proportions for its type.

The blade collar that secures the sword in the scabbard.

The area of the blade just above the habaki collar, where the blade begins to taper.

The front face of the habaki (blade collar) that faces outward when worn.

Broken ink; artistic technique using varying ink tones, sometimes applied to sword decoration.

The boundary line of the hamon; the edge of the tempered area.

Great Bodhisattva Hachiman; the Shinto-Buddhist deity of war, invoked in blade inscriptions.

Grain; the pattern visible in the steel from the folding process.

Grain matching; the harmonious blending of different steel textures in forged construction.

Raised grain pattern where the steel structure becomes prominently visible on the blade surface.

Tendency for grain to stand out; steel showing pronounced hada visibility.

Grain standing out; when the steel grain pattern becomes prominently visible or raised.

Mixed grain; steel showing multiple hada patterns blended together in the surface.

Prominent grain structure; when the steel's hada pattern stands out distinctly.

Raised grain feeling; the three-dimensional quality of visible steel grain structure.

Cracks or splits in the steel grain structure, considered a serious flaw.

Grain-standing spirit; steel texture where the grain structure appears raised or prominent on the surface.

Raised or prominent grain pattern in the steel surface, showing distinct forge construction lines.

Grain pattern; the visible texture in the steel surface created by the forging process.

Grain standing; condition where the steel grain pattern becomes prominently visible or raised.

Standing grain; visible and pronounced hada pattern on the blade surface.

Grain convergence; areas where different steel grain patterns meet or flow together.

Surface carbon; carbon content visible in the grain structure of the steel.

Edge polishing technique that emphasizes the hamon by creating contrast between blade areas.

The side of the blade showing the most prominent hada reflection or grain pattern.

A reflection or shadow-like pattern visible in the steel above the hamon, creating a subtle visual effect in the blade.

Bush clover motif commonly used in sword decoration, symbolizing autumn in Japanese aesthetics.

Edge crack; a crack in the hardened edge.

Ash tempering technique used in sword making to control carbon content during heat treatment.

Worn sword; blade carried or worn at the side, particularly in formal contexts.

A sword received as a gift or grant from a lord or superior, often indicating high honor.

Worshipping dragon design; decorative motif showing a dragon in reverent or ceremonial pose.

Thigh armor; protective covering for the upper legs consisting of cloth with attached armor plates, worn as part of samurai armor.

Sword abolishment; refers to the 1876 edict banning sword carrying by civilians.

Disuse or abandonment; refers to discontinued techniques or obsolete sword features.

Front face of hakama; refers to the front or display side of formal wear or ceremonial elements.

Blade spirit; the overall presence, quality, and vitality of a sword's appearance.

The outer side when the blade is suspended (for tachi).

The inner side when the blade is suspended.

Brush-swept; sweeping lines extending from the boshi.

Swept surface; blade face showing brushed or swept finishing marks.

Sweeping or brushing effect; describes flowing grain patterns or hamon activity.

Box; storage container for swords, often made of paulownia wood with identifying labels.

Box rust; reddish corrosion pattern that appears in rectangular or box-like formations.

Box mounting or storage; refers to how a sword is arranged or stored in its box.

Box-like appearance; describing angular or rectangular characteristics in blade geometry.

Edge damage or chipping; flaws or breaks in the cutting edge of a blade.

Box cutting; specific type of geometric carving or cutting pattern in fittings.

Box inscription; writing on a storage box identifying the contents, often by a recognized authority, used as authentication.

White beauty; describing the pure, refined white appearance of polished steel.

The temper line pattern visible along the edge, created by differential hardening.

Clear or refined hamon; describes a well-defined, clean temper line with good clarity and definition.

Half-work; incomplete or unfinished sword construction, often referring to partial tempering.

Half-tachi; a sword style between tachi and katana, typically shorter than standard tachi.

Flower-shaped design; decorative motif commonly found in sword fittings and metalwork.

Flower arabesque pattern; decorative motif featuring flowing floral and vine designs.

Diamond-shaped floral crest; common decorative motif on sword fittings and tsuba.

Separated signature; inscription on the nakago that is positioned away from the usual location near the mekugi-ana.

Half-tachi mounting style combining elements of both tachi and katana mounting methods.

Leaping tiger motif; decorative design featuring a tiger in jumping pose.

A craftsman who specializes in carving signatures or inscriptions on sword tangs.

Half-plain; a finish or treatment that is partially polished or refined.

Belly band metal fittings; decorative hardware used to secure or ornament the middle section of a scabbard.

Metal belly band or reinforcing strip on scabbard mountings for structural support.

Metal fittings for belly bands or sashes, part of traditional Japanese armor accessories.

Belly dragon; a type of horimono or decorative carving on the blade surface.

Needle signature; an extremely fine, delicate inscription on the tang.

A Yamato school near Hatakeda. Known for masame-heavy forging patterns.

Activity in the hamon; various crystalline formations and patterns within the temper line.

Heian period (794-1185); the era of court culture when Japanese sword-making traditions developed.

Irregular groove; a hi (fuller) that changes width or depth along its length.

Groove carved into the blade.

Fire color; the oxidation colors that appear on steel when heated during forging.

Groove tip; the terminal end of a hi (blood groove) on a blade.

File marks or texture pattern resembling fire legs extending from the hamon.

Fire step tempering; a specific heat treatment technique creating stepped patterns.

Diamond lattice pattern file marks.

Cypress fence file pattern; diagonal crosshatch yasuri-me on the nakago.

Cypress fence file marks; diagonal crosshatch pattern on the tang resembling traditional fence construction.

Higo Province; a region in present-day Kumamoto Prefecture, home to the Enju school.

Elbow guards or protective plates worn as part of samurai armor.

Bracket-wood grain pattern resembling architectural bracket supports in the steel.

Drawing sword; the act of unsheathing a blade or a type of sword-drawing technique.

Twisted wrap; a spiraling or twisted wrapping technique, often for handle binding.

Third fire-tiger year in the 60-year cycle; used for dating swords (e.g., 1566, 1626).

Flat surface; refers to the flat sides of a blade or flat areas on fittings.

The flat area between the shinogi and the hamon.

Flat wrapping style; binding technique that creates a smooth, even surface.

Flat ridge line on the back of a blade, creating a simple angular profile.

Flat triangular shape; describes a geometric cross-section or profile used in various sword elements.

Flat triangular construction; blade geometry with triangular cross-section and flat sides.

Flat inlay technique where metal is set flush with the surface.

Flat construction without a shinogi ridge, common on tanto and some wakizashi.

Flat sprinkled picture; maki-e level with the surface.

Flat-triangular construction; a rare blade form with flat sides meeting at a ridge.

The convexity or 'meat' of the blade surface, indicating health and remaining material.

Flat brocade textile with metallic threads, used in high-quality sword wrappings and cases.

Wide straight temper line; a suguha pattern of broad width.

Diamond-shaped flat wrapping; a specific pattern of handle binding with diamond motifs.

Diamond wrapping; tsuka-maki (handle wrapping) pattern creating diamond-shaped spaces.

Diamond wrapping; a wrapping pattern creating diamond or rhomboid shapes, typically on handles.

Old name for Hizen Province; refers to swords made in this region of Kyushu.

Full temper; hardening that extends over most of the blade surface.

All-tempered blade where the hamon extends across the entire surface rather than just the edge.

The spirit of hitatsura; refers to the essence of full-surface hardening tempering style.

Counter word for swords; one sword or blade.

Box or chest; a storage container, typically wooden, for swords or sword accessories.

Holes in the tsuba (sword guard) through which the kozuka and kogai are inserted into their respective pockets in the scabbard.

Hizen Province; a region in present-day Saga/Nagasaki Prefectures, home to the Tadayoshi school.

Precious jewel carving; a type of decorative groove featuring stylized gem or treasure motifs.

Kitchen knife; a utilitarian blade for food preparation, distinct from weapons.

A Japanese era name (1156-1159) sometimes found in sword inscriptions and dating.

Sacred jewel; a Buddhist wish-fulfilling gem motif carved on blades.

An ancient Japanese polearm with a straight, double-edged blade mounted on a long shaft.

An honorary Buddhist rank sometimes granted to distinguished swordsmiths and craftsmen.

The most prestigious family of sword appraisers, active from the Muromachi period through Edo. Their origami certificates remain highly valued.

Authentic original work, as opposed to a copy or later interpretation.

Standard construction; the basic, orthodox blade geometry and proportions for a particular sword type.

Carved signature; a smith's name or mark engraved into the tang rather than filed.

A Shinto-era Yamashiro school, founded by Horikawa Kunihiro. Active in early Edo period.

Carved signature; a smith's name or inscription carved into the tang rather than filed.

Carvings or engravings on the blade.

Treasure diamond; decorative diamond-shaped pattern often used in metalwork and lacquer.

Deferred judgement; a status given by NBTHK shinsa when a blade cannot be definitively attributed or authenticated. The item is held for further study rather than being passed or rejected. Blades with horyu status may be resubmitted after additional research or restoration work.

School or lineage of craftsmen, often referring to metalworkers or sword fittings makers.

Narrow groove carved along the blade to reduce weight while maintaining structural integrity.

Narrow straight temper line; a suguha pattern of slender width.

Slender or narrow; describes the thin, elegant proportions of a blade.

Slender body; describes a blade with narrow proportions and elegant taper.

Fraying; fine lines extending from the hamon into the ji.

Worthy of preservation; NBTHK certification indicating a blade meets standards for historical and artistic value.

Hundred flowers; decorative motif featuring various flowering plants, commonly used in sword fittings.

Gourd-shaped hamon pattern with alternating wide and narrow sections.

Gourd pattern; decorative motif resembling bottle gourds, often found in horimono or fittings.

Gourd-shaped temper line; hamon pattern resembling the bulbous shape of a gourd or bottle.

Hyuga Province; a region in present-day Miyazaki Prefecture.

Artifact or relic; an item of historical or cultural significance passed down from the past.

One; the number one, often used in rankings or to denote first-class quality.

Full temper; the entire kissaki area is hardened.

Single-plate boshi; a straight, unbroken hamon pattern in the kissaki area.

One-character; famous Bizen school signing with the character 'ichi'.

Single-leaf hollyhock design; a carved motif often found in horimono representing the Tokugawa family crest.

A repair technique using molten metal to fill gaps or cracks in the blade surface.

Dignified appearance or imposing presence of a sword's overall aesthetic quality.

Family style or school tradition; characteristic techniques passed down within a lineage.

Boar's neck; describes a thick, short neck-like shape in blade geometry.

Boar's neck style; describes a thick, robust blade shape resembling a boar's neck.

Boar's neck feeling; describes a thick, robust neck area in blade geometry.

A stubby, boar-neck shaped point, characteristic of certain Kamakura blades.

Yin-yang; complementary opposing elements in design, often seen in paired decorations.

Lightning; bright zigzag lines in the hamon.

Incised or sunken carving technique where designs are cut into the surface.

Boar's eye pattern; a heart-shaped decorative carving often found on sword tangs or guards.

Heart-shaped openwork pattern commonly found in tsuba and other sword fittings.

Boar's droop; hamon pattern with drooping, irregular formations resembling a boar's profile.

Medicine case carving; relief carving technique resembling decorations on traditional inrō boxes.

A type of decorative motif or carving depicting a beckoning dog gesture.

Sulfur-treated metal surface finish that creates a distinctive yellowish patina on iron fittings.

Sulfur-treated surface finish creating a distinctive patina on metal sword fittings.

A peaked or roof-shaped back, the most common form.

Entering-mountain shape; the nakago-jiri has an angular, mountain-like profile.

Mountain-shaped tang end with a notch.

Colored metalwork; polychrome inlay using various metals.

Colored metals; various metal alloys used for decorative inlay work on sword fittings.

Ise Province; a region in present-day Mie Prefecture, associated with Muramasa.

A lobster-like curved pattern, typically describing the shape of certain sword fittings or decorative elements.

Stone-surface ground; textured lacquer resembling stone.

Stone-texture lacquer finish that creates a rough, granular surface resembling natural stone.

The metal cap or ferrule at the bottom end of a scabbard, often reinforced for ground contact.

One work or piece; refers to a single sword made by a particular smith.

A complete matching set of sword fittings or mountings, typically made by the same artisan.

Wood-grain pattern in the steel, resembling the grain of a wooden plank.

Wood-grain pattern skin/surface.

Thread or cord used for wrapping sword handles and scabbards.

Thread wrapping; the silk or cotton cord binding around a sword handle for grip and decoration.

Thread-straight hamon; an extremely fine, perfectly straight temper line like a thin thread.

Thread wrapping; the silk or cotton cord binding around a sword handle.

Thread-wrapped tachi; formal tachi with wrapped scabbard sections.

A single virtue or merit; term used in sword appraisal to denote one outstanding quality.

Rock peony motif; decorative design featuring peonies growing from rocks.

Bellows or accordion-like folded pattern used in sword fittings and decorative elements.

Accordion-style cord wrapping technique creating a bellows-like pattern on sword handles.

Weak or inferior; describing poor quality in workmanship or condition.

The surface area of the blade between the shinogi and the hamon.

The relationship between the ji (surface steel) and ha (edge steel/hamon).

Irregular grain pattern; uneven or mottled appearance in the steel's surface texture.

Irregular spotted reflection in the ji (surface steel) creating a mottled appearance.

Irregular patches or cloudy areas in the steel's surface grain structure.

Martensite crystals visible in the ji (surface) area, appearing as bright spots.

Positive silhouette openwork.

The boundary area between the hamon (tempered edge) and ji (untempered body) of the blade.

Dark patches or mottling in the ji area.

Ground steel character; the essential nature and quality of the blade's base metal.

Mottled, patchy utsuri pattern.

The base steel of the blade; the steel quality and character.

Ground hardening; areas where the hamon extends into the ji (body) of the blade.

The surface grain pattern visible on the blade, created by folding.

Ground spots; visible grain patterns or markings in the steel surface of the blade.

Reflection or mirroring effect visible in the ji (blade surface) showing forge patterns.

Plain or subdued; describing restrained, understated features without flashy elements.

Ordinary or normal; describes standard, unremarkable sword features or quality.

Blade sword; general term emphasizing the cutting edge or referring to edged weapons.

The butt end or bottom tip of the nakago (tang), opposite from the blade.

Earth dragon motif; a design element featuring dragons emerging from or moving through ground.

Same as jigane; the steel of the blade body.

Buddhist deity motif; often appears as decorative subject on tsuba and other fittings.

Jizo-head shape; a rounded boshi resembling the head of Jizo statues.

Ancient period; referring to the earliest era of Japanese sword making, typically pre-Heian period.

Elegant quality; refined, sophisticated workmanship showing high artistic merit.

Jōji era (1362-1368); a historical period used for dating swords and smiths.

Superior grade; the highest quality rating in traditional sword assessment.

Superior work; a quality ranking indicating excellent craftsmanship, above jō-saku.

Superior craftsman; a ranking indicating high-quality workmanship in sword evaluation systems.

Rope pattern; twisted cord-like decorative design found in various sword components.

Superior work; a high-quality ranking for exceptional sword craftsmanship.

Superior spirit or elevated mind; term describing exceptional quality or refined craftsmanship.

Double edge; refers to secondary hamon lines or layered tempering effects.

Shigeka; smith name, particularly associated with certain sword-making lineages.

Overlapping, complex clove pattern.

Official acceptance or registration of a sword for authentication or documentation purposes.

Important; designation for culturally significant swords in Japanese heritage classification.

Important; designation for significant cultural properties in Japanese sword classification.

Signature including court titles or provincial governorships granted to swordsmiths.

Important; NBTHK designation for blades and fittings of exceptional quality, ranking below Tokubetsu Juyo.

Important Art Object; pre-war Japanese government designation (1933-1950) for culturally significant works including swords. Collectors should exercise considerable caution: Jubi items exhibit enormous qualitative variance, from masterworks approaching Kokuho caliber to pieces now recognized as gimei. Like Juyo Bunkazai and Kokuho, Jubi items cannot be exported from Japan.

Important Cultural Property; current Japanese government designation for cultural treasures, ranking below National Treasure (Kokuho). Cannot be exported from Japan.

Prayer bead pattern; a hamon with small, round formations resembling Buddhist prayer beads.

Turnip-drop construction; similar to kanmuri-otoshi but with a more pronounced drop near the mune.

Cap removal; technique of removing surface layers or coatings to reveal underlying metal or decoration.

Samurai helmet; protective headgear worn with armor, often featuring elaborate decorative elements.

Metal cap or reinforcement piece, often referring to protective fittings on sword components.

Metal cap or ferrule at the end of a scabbard (saya) to protect the tip.

Victory insect; dragonfly motif symbolizing triumph, commonly used in sword decoration.

Flame pattern; a hamon configuration resembling flickering fire or flame shapes.

Flame-surrounded Sanskrit characters; carved religious symbols encircled by stylized fire motifs.

Flame-shaped boshi with flame-like patterns.

Flame-like wind pattern in the hamon, characterized by irregular, flame-shaped formations.

Flame-shaped; describing hamon patterns that resemble flickering flames.

The turn-back; where the boshi curves back along the mune.

Return metal fitting; boshi pattern that curves back toward the spine.

Return angle in the boshi where the hamon curves back toward the spine.

Variant spelling of kaeri-kanagu; boshi pattern curving back toward spine.

Return angle; the curved transition where the boshi turns back toward the spine.

Kaga Province; a region in present-day Ishikawa Prefecture, known for fine koshirae.

Key or hook; may refer to hook-shaped elements in sword fittings or construction.

Song-front curvature; a specific type of elegant curve pattern in the blade's geometry.

Worth or effectiveness; the functional value or merit of a blade's construction.

Shell mouth; describes a specific curved opening shape resembling a shell's aperture.

Shell-mouth braiding pattern used in sageo cord wrapping and other sword cord work.

Altered or changed signature on a sword tang, often to attribute it to a more famous smith.

Block script style of calligraphy used in formal inscriptions on sword tangs and documents.

Apprentice or assistant craftsman working under a master swordsmith.

Same as kakitoshi; through-groove to tang end.

Signature carved in flowing, cursive style with connected strokes.

Groove that runs off the blade into the tang.

A groove carved in flowing, sweeping strokes along the blade surface.

Groove that runs through to the tang end.

Corner or angle; refers to angular features in blade geometry or fittings.

Angular or square-shaped hamon pattern with sharp, geometric transitions rather than flowing curves.

Angular places; sharp corners or edges found on various parts of the sword.

Square termination; groove ending in a square shape.

Angular or square-shaped form, referring to geometric design elements in fittings.

Angular gunome; a hamon pattern with sharp, angular peaks rather than rounded ones.

Square ears; angular, sharp-edged kissaki shape rather than rounded contours.

A flat, square back.

Square Tsuda style; a geometric variant of metalwork or design associated with the Tsuda tradition.

Angular blade edge; a hamon pattern characterized by sharp, angular projections.

Angular or square-edged condition; having sharp, pronounced corners rather than rounded edges.

Corner striking; a type of edge damage or forging technique affecting blade corners.

A forging technique or defect where angular impressions or marks appear on the blade surface during hammering.

Angular standing; refers to sharp, well-defined ridgelines and edges on a blade's geometry.

Angular places; sharp-edged areas or corners in a blade's geometry and profile.

Kamakura period (1185-1333); the golden age of Japanese sword-making under samurai rule.

Upper tip cutting; a specific type of blade damage or wear pattern near the point.

Upper and lower variation; irregular hamon height along the blade edge.

Upper temper line; refers to secondary hamon activity above the main temper line.

A currency unit for copper coins equal to 1000 mon (文); used in historical records to express prices and payments.

Cold colors; blue, purple, or greenish tones in metal patina or lacquerwork.

Metal hardware and fittings on sword mountings, including decorative and functional elements.

Golden color or gold-toned finish applied to metal sword fittings.

Era name (1661-1673) during the Edo period; often refers to swords made during this time.

Iron or steel; the base metal material used in sword construction.

Crown-drop construction; a blade form where the back (mune) side is beveled from about the middle of the blade toward the point, common on naginata and Yamato tradition tanto.

A blade form where the back is beveled near the point.

Appreciation or connoisseurship; the aesthetic evaluation and understanding of sword qualities.

Appraisal or authentication; the formal process of examining and attributing a sword to a specific maker or school.

Attribution signature; inscription added by an appraiser identifying the maker or school.

Hairpin pattern; thin, straight lines extending into the hamon resembling traditional hair ornaments.

Stylized signature or monogram.

Chinese-style guard; refers to ornate tsuba with continental Asian design influences.

Arabesque vine scroll pattern commonly used in sword decoration and metalwork.

Withered or dried appearance in blade steel, indicating loss of vitality or poor condition.

Withered or aged aesthetic quality; a subdued, mature artistic sensibility in sword design.

Withered or aged quality in old blades, showing refined maturity through centuries of aging.

Chief retainer or elder; high-ranking samurai who often commissioned fine swords.

Lower grade workmanship; a sword of inferior quality or craftsmanship.

The thickness of the blade at the back (mune).

Layered carving; a technique where multiple carved elements overlap.

The pommel cap at the end of the handle.

Oak leaf pattern; hamon activity resembling the serrated edges of oak leaves.

Kasuga blade style; a hamon pattern associated with the Kasuga school tradition.

Mist or haze; refers to cloudy, misty patterns in steel or decorative designs suggesting atmospheric effects.

A style of plum blossom design characterized by lively, dynamic representation in metalwork.

Single groove; refers to a scabbard with only one accessory groove (kozuka-hitsu).

Variant spelling of kataochi; shoulder drop from mune toward cutting edge.

One-sided beveling or chamfering, typically referring to asymmetrical edge treatment.

A wood sorrel leaf motif used in sword decorations and family crests, featuring a distinctive three-heart-shaped design.

Shape carving; relief engraving that creates raised decorative forms.

One-sided width; asymmetrical hamon pattern wider on one side than the other.

Single-edged temper line; hamon pattern found on single-edged blades like tanto.

Single-beveled edge construction; one side flat like a chisel, rare on swords but common on some tanto.

One-sided chisel carving; beveled line engraving.

A long sword worn edge-up, thrust through the belt. Became standard from the Muromachi period onward.

Sword bag; protective cloth covering used to store or transport katana.

Sword diagram or illustration; technical drawing showing blade details and measurements.

Katana groove; a longitudinal groove carved into a katana blade for weight reduction.

Signature on a katana, typically inscribed on the nakago tang.

Front face of katana; the side facing outward when worn edge-up in the obi.

Shoulder drop; sloping line from mune to cutting edge near the base.

Lopsided gunome where one side drops more than the other.

Single-handed wrapping technique used in handle construction or binding.

Armor maker; craftsman specializing in the construction and decoration of samurai armor and related equipment.

Personal preference or convenience; individual smith's characteristic technique or style choice.

Diagonal file marks slanting upward to the right.

Diagonal file marks slanting downward to the right.

Leather wrapping; covering applied to tsuka or other sword components using leather strips.

Leather wrapping or covering, typically used on scabbards or sword fittings.

Unusual or variant groove carving; any non-standard or creative interpretation of traditional hi patterns.

Variant round shape; an altered or modified circular form in sword components.

Variant lacquer; decorative lacquer technique using unusual colors, textures, or application methods.

Frog clove; hamon pattern resembling frogs arranged in clove-like formations.

Small round spots in the hamon resembling frog eggs; a type of hataraki.

Tadpole-head choji; cloves with bulbous heads like tadpoles.

Hair-line engraving; fine incised lines.

Polluted or impure hamon; a flawed temper line with irregular or contaminated appearance.

Swords made during the Keichō era (1596-1615), marking the transition from wartime to peaceful Edo period.

Shape or form; refers to the overall configuration and proportions of sword components.

Sword carving; depiction of a Buddhist ritual sword.

Sword-shaped; referring to straight, double-edged blade forms or decorative elements mimicking ancient ken.

Sword-tip shape; the nakago-jiri ends in a pointed, sword-like form.

Inspector-style shape; a specific tang configuration associated with official sword examination standards.

Sword-tip shaped tang end.

Presentation or offering to a superior; swords made as gifts to lords or the emperor.

Presentation inscription indicating the sword was made as a gift to a lord or superior.

Presentation-grade tsuba made as gifts to lords or high-ranking officials.

Sword point shape; refers to the configuration and geometry of the blade tip.

Sword cord or braided rope used for securing or decorating sword mountings.

Tweezers pattern; openwork design in tsuba resembling tweezers, often featuring parallel elongated openings.

Tweezers carving; a decorative pattern resembling tweezers or hair-pulling implements.

Tweezers-shaped openwork design, commonly found in tsuba and other sword fittings.

Tweezer-shaped groove; an elongated oval or eye-shaped carving on the blade.

Healthy; well-preserved condition with minimal wear.

Diagonal cut from shoulder to opposite hip; named after Buddhist monk's robe pattern.

Cosmetic finish or decorative treatment applied to sword components.

Cosmetic finishing or decorative treatment applied to sword components.

Decorative file marks on the nakago applied for aesthetic rather than functional purposes.

Decorative file marks on the tang, applied for aesthetic rather than functional purposes.

Decorative file marks; ornamental yasurime added for aesthetic effect rather than functional finishing.

Masterpiece; an exceptional work representing the highest skill of a swordsmith.

Japanese zelkova wood, commonly used for scabbard construction and sword storage boxes.

Auspicious day; lucky date often inscribed on tangs to mark completion.

Precious; post-war NBTHK designation discontinued and discredited due to authentication scandals. Treat as equivalent to no papers—approximately 95% of attributions are unreliable. Exception: low-value fittings from inexpensive schools where modern Hozon certification costs exceed the value gained. Also called 'white papers' in Western collecting.

Kii Province; a region in present-day Wakayama Prefecture.

Pheasant thigh shape; a nakago-jiri (tang end) cut in a forked or split configuration.

Natural wood finish with clear lacquer, showing the wood grain beneath the coating.

Pheasant thigh; refers to the distinctive tapering shape seen in early Heian to Kamakura period nakago.

Pheasant-thigh shape; a nakago (tang) shape that tapers like a pheasant's thigh, characteristic of early tachi.

Hexagonal tortoiseshell pattern used in decorative metalwork and lacquer designs.

Tortoiseshell pattern hammering technique used on metal fittings and armor components.

Chrysanthemum flower; decorative motif commonly used in sword fittings and horimono.

Chrysanthemum crest; the Imperial emblem.

Made by Kiku; signature indicating the smith's name contains the character for chrysanthemum.

Gold; precious metal used for inlay, decoration, or enhancement of sword fittings.

A drawstring pouch or bag, often used to carry small sword accessories or tools.

Gold damage or defect; flaws in gold inlay work or gilding on sword fittings.

Gold and silver; precious metals used in decoration and inlay work.

Goldfish hanging ground; a specific type of surface pattern or texture.

Gold-colored metalwork.

Golden rooster; a decorative carving motif featuring a stylized cockerel design.

Gold erasure; technique of removing or subduing gold decoration on blade surfaces.

Gold shaving joint; a repair technique using gold filings to fill gaps or cracks.

Metal rim or border work, often referring to decorative edging on fittings.

Gold rim or border fitting on sword mountings, often decorative edging on tsuba or other fittings.

Gold pear-skin ground.

Gold pear-skin ground; lacquer technique with gold powder creating textured, granular surface.

Golden sparkling effect in the hamon created by dense nie crystals reflecting light.

Gold transfer technique where gold is applied and burnished onto iron or steel surfaces.

Gold-divided ground; decorative technique using gold inlay to separate design elements.

Gold inlay.

Natural, unbleached silk color; off-white or cream colored silk cord.

Date inscription; a signature on the tang that includes the year of manufacture.

Forbidden characters; taboo words or names avoided in sword inscriptions due to imperial decree.

Metalworking; the craft and techniques of working with metals in sword fittings.

Gold crest; family crests or decorative patterns executed in gold on sword fittings.

Pure gold; solid gold construction without plating or overlay.

Gold lacquer/powder signature; attribution written in gold lacquer (urushi mixed with gold powder). A decorative form of attribution sometimes seen on shirasaya. Less authoritative than kinzogan-mei (gold inlay) as the lacquer can be more easily applied and is not permanent. Also romanized as kimpun-mei.

Gold brocade; luxurious textile with gold thread used in sword bag and wrapping applications.

Early modern period (1603-1868), corresponding to the Edo period in Japanese sword history.

Prohibition or ban; often refers to restrictions on sword making or ownership.

Golden lines; bright, shiny streaks in the hamon.

Silk-textured fish roe pattern; fine nanako with silk-like surface texture.

Gold-inlaid signature; attribution inlaid in gold by an expert appraiser, typically on shortened (o-suriage) blades. Considered the most prestigious form of attribution when done by recognized authorities like the Hon'ami family. The gold inlay is permanent and indicates high confidence in the attribution.

Horizontal file marks.

Straight-cut tang end.

Paulownia arabesque pattern; decorative motif combining paulownia flowers with flowing vine scrollwork.

Cut-off tang end; a nakago tip that appears to have been shortened or cut.

Paulownia crest; an imperial and government emblem.

File marks on the tang; distinctive patterns used for identification and grip enhancement.

Straight horizontal file marks across the tang, one of the basic yasurime patterns.

Cutting edge; the hardened steel portion of the blade formed by differential tempering.

An ancient blade form with a triangular cross-section, found mainly on early ken.

The cutting edge of a blade; the sharp portion designed for cutting.

Blade construction with a single beveled edge, typically found on tanto and utility blades.

Decorative technique using small cut pieces of gold leaf applied to lacquer or metal surfaces.

Cut or notch in the blade edge, typically from combat use or testing.

Cut signature; an inscription added to the tang by someone other than the original smith.

Cut short; a blade or tang that has been shortened from its original length.

Strange or unusual appearance; irregular patterns or anomalies in the blade.

The point or tip section of the blade.

The length measurement of the kissaki (point) from yokote to tip.

Forging; the process of folding and welding the steel to create the blade.

Forging crack; separation in the laminated steel.

Expert attribution; formal appraisal of unsigned blades.

Authentication inscription on the tang certifying the blade's attribution by an expert.

A blade that has been authenticated or certified by an expert appraiser.

Flaw; defect or damage in the blade.

Old Aoe; early Bitchu school work.

Small, short ashi.

Old Bizen; early Bizen school work before Ichimonji.

Small clove pattern.

Small clove-shaped irregular hamon pattern with fine, delicate undulations.

Small or minor workmanship; refers to blades of lesser quality or craftsmanship.

Small collar fitting at the base of the tsuba, part of the sword mounting hardware.

Early generation Gotō school metalworkers, renowned for exceptional quality sword fittings.

Small gunome pattern.

Small irregular wave pattern with subtle variations; a delicate gunome hamon with fine undulations.

Small irregular clove-shaped hamon; fine gunome pattern with varied, random spacing.

Small distortion; minor warpage or deviation from proper blade geometry.

Old Hōki school of swordsmiths active in Hōki province during the Kamakura period.

Incense color; pale yellowish-brown patina or coloration on metal surfaces.

Fine, small wood-grain pattern.

Fine wood-grain pattern; a tight, small itame grain texture in the steel.

Small utility knife stored in the scabbard alongside the main blade.

Small metalwork; fine decorative metal fittings and ornamental details on swords.

Old metalwork; antique or classical Japanese metalworking techniques and styles.

A small point, typical of Heian and early Kamakura period blades.

Small notches; fine serrations or minute irregularities along the blade edge.

Old Kyushu; refers to ancient sword-making traditions and schools from Kyushu island.

Small, rounded turn-back.

Small rounded feeling; describes a subtle curvature or gentle rounding in blade geometry.

Small signature; a brief or abbreviated inscription on the tang, typically shorter than a full mei.

Small irregular pattern.

Small irregular patterns mixed into the hamon; fine chaotic elements within the temper line.

Old Mino school; early period swordsmiths from Mino province (modern Gifu).

Fine, small burl-grain pattern.

Small pattern or design; fine decorative motifs on sword fittings or blade features.

Small, fine nie particles.

Made predominantly of small nie.

Small nie feeling; subtle, fine crystalline particles in the hamon structure.

Small meat; minimal thickness or ridge height in the blade's cross-section.

Small, gentle wave pattern.

Small notare style; gentle, small-scale undulating hamon pattern.

Small wet appearance; subtle moisture-like effect in hamon or steel surface.

A plain wooden scabbard used for storage and protection of the blade when not mounted.

Small spacer washers; thin metal discs placed between the tsuba and blade or handle.

Small curvature; a slight bend or curve in a blade, less pronounced than standard sori.

Blades with slight curvature; swords having a subtle, gentle bend in their profile.

Small accumulation or buildup; minor clustering of structural elements.

Branch school of Uda smiths known for refined workmanship in the Kamakura period.

Small side sword; a short wakizashi typically measuring under 40cm in blade length.

Small curve; refers to a slight or minor curvature in the blade's geometry.

Small cracks or minor splitting, typically referring to defects in the blade or fittings.

Minor staining or discoloration on the blade surface, typically from age or handling.

Old Yoshii school; early lineage of the Yoshii sword-making tradition.

Slight curvature; a shallow or minimal curve in the blade's profile.

Small curve item; refers to blades with subtle or minimal curvature in their overall shape.

Small bean field pattern; fine, scattered grain texture resembling small beans.

Small size or compact proportions; describes a blade that is shorter or smaller than typical.

Fist-shaped; describes a rounded, bulbous form resembling a clenched fist.

Ancient or classical style; referring to old-fashioned characteristics in sword construction.

A short tachi, smaller than a standard tachi but larger than a wakizashi.

Small sword fittings including kozuka, kogatana, and other minor metal accessories.

Armor fittings and accessories; metalwork components used in Japanese armor construction.

Utility knife handle; the decorative handle of a small knife stored in the scabbard.

Elegant antiquity; refined classical beauty in a blade's appearance and workmanship.

A hair-arranging implement fitted into the scabbard.

Metal collar or ferrule that secures the kōgai (hair pick) in the scabbard.

Alternative spelling of kōgai-hitsu; groove in scabbard for the kogai utility tool.

Groove or slot in a scabbard designed to hold the kōgai (hair ornament/utility tool).

Burnt or overheated areas in the hamon caused by excessive heat during the tempering process.

The handle portion of a kogatana (utility knife) that fits into the scabbard.

Yellow pond lily; decorative motif often carved or inlaid on sword fittings.

Carp; a popular decorative motif symbolizing strength and perseverance in Japanese sword arts.

The mouth of the scabbard; where the blade enters.

The end cap of the scabbard.

Moss-like file marks; a type of rough, irregular yasuri pattern on the nakago.

Ancient metalwork; traditional or antique metal crafting techniques and their products.

Fine, small-scale chopping or notching pattern, often seen in hamon or decorative work.

Ancient elegance; refined classical beauty characteristic of early period sword work.

Carving or engraving; decorative cutting work on sword fittings or blade surfaces.

National Treasure; the highest official Japanese government designation for cultural properties, including swords of supreme historical and artistic value. Cannot be exported from Japan.

National teacher; a title sometimes found in sword inscriptions referring to Buddhist masters.

Carved groove or line resembling horse-leading reins, a type of decorative engraving.

Small rounded point; a compact, rounded hamon pattern at the sword tip.

Very fine grain texture resembling rice bran; extremely tight steel folding pattern.

Rice bran grain pattern; an extremely fine, almost invisible grain texture in the steel.

Packed or concentrated; describes dense, tightly formed patterns or structures.

Bulging or swollen mimi (edge) on the nakago, resembling a pregnant form.

The ridge or raised area along the shinogi line; the thickness of the blade at the ridge.

Shell metal; decorative metalwork technique creating patterns resembling turtle shell designs.

Shell-shaped metal fittings or decorative elements used in armor and sword mountings.

Small scabbard; a plain wooden sheath used for storage or as an inner liner for decorated scabbards.

The area of a blade between the nakago and the widest part; blade waist or hip.

Short groove in the lower blade section.

Hip opening; the widened area where a groove begins to taper at its base.

Small utility knife carried alongside the main sword in the scabbard of a katana or wakizashi.

Short groove in the lower part of the blade.

Small notches at the base; decorative carving of tiny cuts near the sword's habaki area.

Hip surface carving; decorative grooves or carvings located on the lower portion of the blade near the tang.

The area at the base of a groove (hi) where it begins, typically near the tang.

Wide-hipped groove; a horimono that flares outward at the base near the habaki area.

Hip-piercing groove; horimono extending from the base upward along the blade's length.

Hip hammer carving; a groove or carving representing a craftsman's hammer on the blade.

Hip temper; hardened area extending from the cutting edge toward the spine near the tang.

Echizen style; characteristics typical of swords made in the Echizen province tradition.

Small utility knife stored in the scabbard; accompanies the main sword in formal mountings.

The side surface area of the blade near the base or hip section, referring to the lower portion geometry.

The area of the blade near the tang where the curvature typically begins.

Metal-monkey year in the sexagenary cycle; used for dating swords (e.g., 1560, 1620).

Mountings; the complete set of fittings and furniture for a sword.

Curvature concentrated near the base of the blade, typical of early tachi.

Higher grade of Tokubetsu Kicho, distinguished by a blue cover ('blue papers' in Western collecting). Unlike green/white papers issued by provincial branches, Koshu Tokubetsu Kicho was issued by the central NBTHK authority in Tokyo and was not affected by the authentication scandals. More reliable than other Kicho-era papers but still not up to modern Hozon standards in rigor.

Binding or restraint; refers to structural constraints in blade construction or mounting.

Small-scale forging technique or fine hammer work in blade construction.

Armored sleeves that protect the arms and hands in samurai armor.

Old sword; blades made before approximately 1596.

Silk strings originally used for koto instruments, sometimes used in sword fittings.

Old sword Ensho; referring to ancient blades from the Ensho period or style.

A small utility knife fitted into the scabbard.

Groove in the scabbard designed to hold the kozuka utility knife.

Small charcoal pieces used in traditional sword polishing and maintenance processes.

A slightly angular or cornered ridge line characteristic, describing subtle geometric qualities in blade geometry.

Small stacking; a fine layering pattern in the steel construction.

Small angle or corner; referring to subtle angular features in blade geometry.

Small angle; minor angular features or subtle geometric elements.

The notch or step between the blade and tang; marks the boundary of the cutting edge.

Alternative reading of ku-deki; refers to nine classical sword-making traditions or styles.

The area of the blade above the machi notch, referring to the transition from tang to blade.

Interlocking or meshing pattern; overlapping design elements that fit together.

A downward curving defect in the blade's edge, resembling a stake driven into the ground.

Misalignment or discrepancy, often referring to inconsistencies in blade features.

Offset pattern; hamon that appears to miss or skip.

Misaligned or offset style; decorative pattern with deliberately staggered elements.

Assembly or construction method; the way components are put together in sword making.

A complex braided wrapping method used in sword handle construction and binding.

Upper wrapping technique using braided cord in sword handle construction.

Braided cord; traditional Japanese braiding technique used for sword cords and decorative elements.

Province or country; refers to the geographic region where a sword was made.

Regional sword-making style or construction method characteristic of a particular province or area.

Rank or grade; the hierarchical classification or quality level of a sword.

Evening or twilight effect; subtle gradations in hamon activity resembling dusk.

Evening hand; a poetic term sometimes used in sword inscriptions or documentation.

Chestnut-shaped knob on scabbard through which the sageo cord is threaded.

Chestnut-shaped tang end; rounded.

Dragon coiled around a sword; Buddhist deity representation.

Kurikara dragon; carved design of a dragon wrapped around a sword, Buddhist protective symbol.

The knob on the scabbard through which the sageo passes.

Black wax-like lacquer finish with a deep, lustrous appearance used on scabbards.

Black lacquer.

Black spots or dark inclusions in the steel, typically considered flaws in the metal.

Grass; informal or cursive style, often referring to rough or preliminary work.

Tassets or skirt plates of armor that protect the thighs and hips.

The cords or ties used to attach kusazuri plates to the main body armor.

Comb-shaped metal fittings or decorative elements on sword mountings.

Antler or stag-beetle horn shape; a decorative V-shaped element found in carvings and helmet crests.

Mulberry shell; a specific color or pattern resembling mulberry wood with shell-like qualities.

Nine luminaries crest; family mon featuring nine celestial bodies arranged in traditional pattern.

Collapsed or broken core; describes structural weakness or deterioration in the blade's center.

Kyoto; often used to denote swords or fittings made in the imperial capital.

Items made in Kyoto style or by Kyoto craftsmen, often referring to high-quality sword fittings.

Grade or class designation used in sword evaluation and classification systems.

Bound with leather; a wrapping technique using leather strips or cord covering.

The notches at the base of the blade where it meets the tang.

The machi has been moved; the blade shortened by moving the notches.

Town carving; metalwork on sword fittings done by independent commoner craftsmen, as opposed to ie-bori work by family schools with official patronage like the Goto.

Sheet; a counter for oban (大判), the large oval gold coins used in historical price records.

Front cutting; refers to the primary cutting edge or forward cutting action of a blade.

Sprinkled picture; lacquer technique using gold/silver powder.

Marici; a Buddhist deity of light and invisibility, carved on blades for protection.

Round or circular; describes rounded features or simple construction methods.

Round termination; groove ending in a rounded shape.

Round or circular shape; refers to circular cross-sections or rounded forms in sword components.

Round return; a boshi pattern where the hamon curves back in a circular arc.

Round tang end; a nakago tip finished in a rounded or curved shape.

Rounded ear-like projection at the top corners of the tang.

A rounded back.

Round Tsuda style; a circular variant of metalwork or design associated with the Tsuda tradition.

Round forging; a forging method or cross-sectional shape of the blade.

Round carving; a type of groove with a circular cross-section carved into the blade.

Straight grain pattern running parallel to the blade length.

Straight-grain core; kitae structure with masame grain running through the center.

Straight grain pattern skin/surface.

Pine bark; textured surface treatment on scabbards resembling pine bark pattern.

Pine bark grain pattern; irregular, rough-textured steel grain resembling tree bark.

The signature inscribed on the tang.

The style or manner of inscribing signatures on the tang, characteristic of specific smiths.

The style or manner of carving a signature on the nakago tang.

Famous blade; a sword of exceptional fame and quality.

Famous items catalog; historical records listing celebrated swords and their provenance.

Famous items register; historical records cataloging renowned swords and their provenance.

Signature style or manner; the characteristic way a smith inscribes his mei.

Register of signatures; reference book of smith signatures.

Famous place names often referenced in sword inscriptions or poetic allusions on blades.

Famous blade; a sword of exceptional quality and historical significance.

Bamboo or wooden peg securing the blade tang to the handle through mekugi-ana holes.

Peg hole(s) in the tang for securing the handle.

Ornamental grip fittings placed under the handle wrapping.

A tanto worn on the right side of the body with the point facing forward, as opposed to the standard left-side carry.

Irregular, mixed temper pattern.

Irregular formation; a hamon with varied, uneven patterns and activities.

Irregular or wild temperline pattern; describes chaotic, unpredictable hamon activity.

Irregular pattern continuing into the boshi.

Irregular, wavy utsuri pattern that mirrors the hamon.

Irregular temper line; general term for non-straight hamon.

Polished surface; the refined, mirror-like finish achieved through final polishing stages.

A blade that has been shortened and repolished, often removing the original signature.

Polished ground; a smooth, mirror-like surface finish on the blade.

The width of the blade.

A Bingo Province school active from Kamakura through Muromachi. Known for tight ko-itame and refined suguha.

Fine dust; extremely fine grain structure in the steel, barely visible to the eye.

Mikawa Province; a region in present-day eastern Aichi Prefecture.

Thickness of the blade edge or rim; measurement of the cutting edge dimension.

Ear-shaped tang end; a rounded, curved nakago-jiri resembling an ear.

Ear-shaped tang end; a rounded, curved nakago-jiri resembling an ear outline.

Ear pick; a small implement sometimes incorporated into kozuka or other sword accessories.

Full tempering; when the entire blade surface shows hamon activity from edge to spine.

Style resembling full tempering; appearance similar to complete blade hardening.

Mino Province; a region in present-day Gifu Prefecture, one of the Five Traditions (Gokaden).

Mino province carving style; a regional style of groove carving associated with Mino smiths.

To see or examine; used in appraisal contexts for viewing blade features.

A Yamashiro school of the Shinto era, known for elegant suguha and fine workmanship.

The three-piece set of kozuka, kogai, and menuki.

A three-sided back with a flat top.

Three-leaf hollyhock crest; the Tokugawa family mon often used on sword fittings.

Set of three matching sword fittings, typically kozuka, kōgai, and menuki.

Triple comma design motif; three interlocked comma shapes forming a circular pattern.

Water shadow; a hazy diagonal line appearing near the ha-machi, typically indicating the blade has been retempered. Generally considered a flaw.

Sixtieth year in the sexagenary cycle; calendar designation used in dating sword inscriptions.

Young green color; fresh spring green used in lacquerwork and textile descriptions.

Four-lobed decorative shape resembling a cross-section of a quince fruit.

Four-lobed shape resembling a cross-section of a quince fruit, common in tsuba design.

Burl or swirling grain pattern, like knots in wood.

Burl-grain pattern skin/surface.

Momoyama period (1573-1603); a brief era of lavish culture bridging Muromachi and Edo.

Family crest; heraldic emblem.

Family crest specialist; craftsman who creates mon (family emblems) on sword fittings.

Depth of character; the profound aesthetic quality and presence of a blade.

The striking portion of the blade, approximately the upper third.

Double-edged construction, typical of ken.

Two-handed grip; a handle or mounting designed for gripping with both hands simultaneously.

Various small fittings; collective term for minor sword mountings and accessories.

A type of handle wrapping where both edges of the tsuka-ito are folded and wrapped together.

Base or origin; refers to the area near the tang or starting point of features.

Thickness of the blade at the base near the tang; measurement of spine width at origin.

Base edge; the portion of the cutting edge near the tang of the blade.

The width of the blade at the base (machi).

The thickness of the blade measured at the base near the habaki area.

Wheat field chisel; engraving tool or technique creating patterns resembling wheat stalks.

Plain or undecorated; lacking inscriptions, horimono, or other ornamental features.

Patternless or invisible grain, extremely fine forging.

Directional intent; the deliberate orientation or positioning of design elements in sword construction.

Plum blossom gold; gold inlay or decoration in plum blossom patterns.

Unsigned; no signature on the tang.

Unsigned attribution; expert determination of an unsigned blade's maker or school.

The back of the blade (opposite the cutting edge).

Ridge prominence; when the mune (back ridge) is particularly pronounced or well-defined.

The notch on the back (mune) side.

Ridge beveling; the angled cutting or shaping of the mune (back ridge) of the blade.

The angle and shape of the spine (mune) as it tapers toward the point.

Ridge drop; the gradual tapering or lowering of the spine toward the point of the blade.

Ridge line deviation; refers to the positioning or alignment of the mune (back ridge).

Tempering along the back (mune) of the blade.

Village moon; a poetic term sometimes used in sword inscriptions or artistic references.

Purple leather used for wrapping sword components or scabbard covering.

Muromachi period (1336-1573); era of mass sword production and rise of the uchigatana.

Musashi Province; a region covering present-day Tokyo, Saitama, and eastern Kanagawa.

No curvature; a straight blade.

Gently angled or softly cornered shape, typically referring to blade geometry.

An extended or elongated tang end, referring to a nakago that is longer than typical proportions.

A weapon with a blade similar to a tachi but with an exceptionally long handle wrapped in cord.

A sword blade that was originally a nagamaki (long-handled weapon) but later converted to a standard katana or wakizashi.

Flowing pattern or directional grain flow in the steel structure.

Flowing character or tendency; describes directional movement in patterns or grain.

Flowing grain pattern, where the hada appears to flow along the blade.

Flowing straight grain; masame hada with a flowing, directional appearance.

The length of the blade, measured in a straight line from the machi to the tip.

A polearm with a curved, single-edged blade mounted on a long shaft, used by samurai, warrior monks (sohei), and trained in the traditional martial arts.

Naginata-style groove; a groove pattern imitating the form found on naginata blades.

A sword blade converted from a naginata by shortening and reshaping the tang.

Naginata conversion construction; a blade reshaped from a naginata into a sword form.

Naginata construction; a blade form with a reverse curve, originally for naginata but sometimes found on swords.

Middle period of the Aoe school of swordsmiths, active in Bitchū Province.

Middle curve; refers to the curvature located in the central portion of the blade.

Medium-width straight hamon pattern with moderate tempering activity.

The tang; the part of the blade that fits into the handle.

Tang hole; the mekugi-ana or other holes pierced through the sword's tang.

The end/tip of the tang.

The ridge or spine of the tang; the back edge of the nakago opposite the cutting edge.

The length measurement of the tang from the machi to the nakago-jiri.

Curvature present in the tang portion of the blade, following the main blade's sori.

The shape and form of the tang, including its profile and proportions.

Curvature located primarily in the tang area of the blade.

The blade itself, referring to the steel core or interior structure of a sword.

Center curvature; deepest point of curve is in the middle of the blade.

Crying fox; a specific famous blade name, or describes a particular sound quality when testing.

Sea cucumber openwork; irregular oval-shaped pierced openings in tsuba resembling sea cucumbers.

Catfish skin grain; a steel texture resembling the smooth, slippery surface of catfish.

Southern barbarian iron; foreign steel imported from Europe or Southeast Asia during the 16th-17th centuries.

Historical period (1336-1392) when Japan had two imperial courts; era of long, elegant sword production.

Wave-pattern ground; decorative surface treatment resembling flowing water waves.

Wave pattern; general term for the undulating grain patterns visible in tempered steel.

Fish-roe pattern; tiny raised dots covering a surface.

Fish-roe ground; a surface covered with nanako pattern.

Northern and Southern Courts period (1336-1392); era of large, impressive blades.

Straight sword; ancient Japanese sword form without curvature, predating curved tachi.

School of metalworkers based in Nara, known for iron tsuba and fittings.

Pear-skin ground; lacquer with gold flakes creating texture.

Pear-skin texture, a fine, granular surface appearance.

Pear-skin inlay; inlay technique creating a textured surface resembling pear skin.

Nihon Bijutsu Token Hozon Kyokai (Society for Preservation of Japanese Art Swords); the primary authentication organization for Japanese swords, issuing Hozon, Tokubetsu Hozon, Juyo, and Tokubetsu Juyo certifications.

Year period or date; chronological information used in dating and authenticating swords.

Dated work; a blade bearing an inscription indicating the year of manufacture.

Refined color; the subtle color variations in well-forged and polished steel.

Hardened leather made by boiling and pressing, used in armor and sword scabbard construction.

Processed leather treated with lacquer or other substances, often used in sword fittings.

Sticky or viscous quality; describes a thick, heavy appearance in steel or hamon.

Mouse-foot pattern; small projections extending from the hamon edge resembling tiny feet.

Two-step hamon; a temper line with distinct upper and lower levels creating a stepped appearance.

Two places; refers to dual locations or paired features on sword construction.

Two parallel grooves carved into the blade surface to reduce weight and improve balance.

Individual crystals of martensite visible as bright, sparkling particles in the hamon and ji areas.

Crystalline formations extending from the hamon into the hada like legs or roots.

Made predominantly of nie; a bright, crystalline hamon appearance.

Nie-dominant; more nie than nioi in the hamon.

Variant of nie-gori; coarse crystalline particles creating a rough, granular appearance in hamon.

Coarse nie; large, irregular crystalline particles in the hamon that appear rough or grainy.

Collapsed nie; areas where nie structure has broken down.

Boshi with collapsed or disintegrated nie.

Clusters or concentrations of nie crystals in the hamon; creates bright, sparkling areas.

Combined nie and nioi; hamon showing both coarse and fine crystalline structures.

Nie lines; streaks formed by concentrations of nie.

The attachment or formation of nie crystals along the hamon, creating bright metallic particles.

Formation of nie crystals; the process of large grain martensitic particles appearing.

Utsuri formed by nie particles, characteristic of Yamashiro work.

Nie-style; hamon characterized by prominent nie (large crystalline particles) activity.

Rich in nie; describes a hamon with abundant bright crystalline particles throughout.

Cloudiness or muddiness in the steel or hamon, indicating impurities.

Two-character signature; mei consisting of exactly two kanji characters on the nakago.

Bleeding or seeping effect where hamon elements blur into the steel.

Double or two-layered; describes construction with two distinct layers or elements.

Twenty-person edge; refers to a blade's cutting capacity or sharpness in historical context.

Double-layered hamon; temper line showing two distinct hardened zones.

Double-edge pattern; a secondary line parallel to the main hamon.

The flesh or meat of the blade; the convex surface thickness.

Flesh curvature; the subtle curve in a blade's thickness distribution creating dimensional depth.

The distribution of thickness/meat across the blade, indicating robustness.

Extremely fine martensite particles not individually visible, creating a misty, cloud-like appearance along the hamon.

Made predominantly of nioi; a soft, misty hamon appearance.

Nioi-dominant; more nioi than nie in the hamon.

The visible edge of the hamon where hardened steel meets softer steel.

Brocade wrapping; decorative silk fabric covering used on sword fittings or storage.

Two-piece set, typically referring to matching kozuka and kogai fittings.

Imitation or fake item; a reproduction made to resemble an authentic piece.

Norisada; refers to smiths or works associated with this name lineage.

The feeling or appearance of extension; refers to graceful elongation in blade proportions.

Rising grain; steel grain pattern that appears to flow upward along the blade.

To extend or stretch; may refer to elongated proportions in blade geometry or fittings design.

A Yamashiro school active from late Kamakura into Muromachi, often showing Soshu influence.

Extra-long tachi sword, typically over 3 shaku (90cm), used ceremonially or by foot soldiers.

Decorative motif resembling dried abalone strips, symbolizing good fortune in Japanese art.

Gentle, wave-like undulations in the hamon.

Undulating temper line; a hamon with gentle, wave-like curves along the cutting edge.

A subtle undulating quality in the hamon; having the spirit or essence of notare patterning.

Notare with clove pattern; wavy hamon combined with regular semi-circular gunome formations.

Waves that extend deeply into the blade.

Irregular notare; wavy hamon pattern with additional random undulations and variations.

Nihon Token Hozon Kai (Japan Sword Preservation Society); a sword authentication organization issuing certificates including Kanteisho grades.

Gap, void, or missing element; absence of expected feature or component.

Cloth-pattern inlay; metal pressed into cross-hatched surface.

Wet appearance; describes a lustrous, moist-looking surface quality on the blade.

Wet appearance; describes areas of the hamon or hada with a moist, dark quality.

Wet application technique in lacquerwork where successive layers are applied before the previous layer fully dries.

Wet blade appearance; a hamon with a moist, glossy quality that appears to glisten like wet steel.

A type of hamon where the temper line appears to 'wet' or soak into the steel with soft, blurred edges.

Wet appearance; lustrous, moist-looking surface quality in the steel or hamon.

Large clove pattern.

Great sword; an extra-large tachi, typically over 90cm, used ceremonially or by cavalry.

Large gunome pattern.

Great master carving; high-quality horimono executed by renowned artisans.

Large, coarse wood-grain pattern.

A large, extended point, characteristic of Nanbokucho period blades.

Large, rounded turn-back.

Large irregular pattern.

Large, coarse burl-grain pattern.

Large, pronounced wave pattern.

Steeply angled diagonal file marks.

Greatly shortened; tang significantly reduced in length, typically resulting in loss of the original signature (mei).

Excellent sharp blade; higher grade of cutting ability classification, indicating superior sharpness.

A Japanese era period (1368-1375); often referenced in sword dating and historical classification.

Belt fastening; a cord or tie used to secure an obi sash or similar binding.

Belt attachment or sword suspension method; refers to wearing arrangement of mounted blades.

Hazy silver; a muted silver finish or patina with a cloudy, subdued appearance.

Hazy silver; a muted silver alloy used in sword fittings with a subdued, cloudy appearance.

Gentle, calm, or subdued appearance; restrained and peaceful aesthetic quality.

Placed metal; decorative metal inlay or overlay applied to surfaces.

A type of file mark pattern on the nakago resembling the wrinkled face of an old man.

Raised rim or edge detail on tsuba or other sword fittings.

A Yamato school associated with Omiya shrine. Includes Morikuni and later generations.

The front or outer side (facing out when worn).

Famous Kamakura period tachi by Kunitsuna; one of the Tenka-Goken legendary swords.

Certificate of authenticity; traditionally folded appraisal document, historically issued by the Hon'ami family during the Edo period.

Folded metal technique used in sword construction or decorative metalwork.

Folded-back construction method, particularly referring to the turned edge in sword mountings.

Folded-back signature; the original mei preserved when shortening.

The process of wholesale distribution or initial sale of swords from smiths to dealers.

The most prolific Bizen school, active from Kamakura through Edo. Includes sub-branches like Nagamitsu, Kagemitsu, and later generations.

A hamon pattern that appears to push outward from the edge in rounded, bulging formations.

Rubbing or impression of a blade; paper copy showing nakago details and signatures.

Second grade or class B; a ranking designation for sword quality assessment.

Mother-of-pearl inlay technique used in decorating sword fittings and scabbards.

A major Yamashiro school in Kyoto, active from mid-Kamakura through Nanbokucho. Known for elegant nie-deki work.

Thunder pattern; geometric spiral design resembling stylized thunder or lightning motifs.

Sacred fungus motif; decorative design representing the lingzhi mushroom of immortality.

Connected grooves; multiple parallel hi (grooves) running along the blade surface.

Lotus pedestal; Buddhist lotus throne carving.

Lotus flower; decorative motif commonly used in horimono and tsuba designs.

Paired lions; decorative motif showing two lions, often in playful interaction.

Ring or circular element, often referring to decorative rings on sword fittings or stands.

Wheel treasure; a Buddhist symbol sometimes carved as horimono on sword blades.

Wax-color finish; highly polished black lacquer.

Wax-color lacquer; a high-gloss black urushi finish polished to a mirror-like sheen.

Absent or missing design elements; decorative pattern suggesting something not present.

Both or pair; indicates bilateral symmetry or refers to matching elements in sword construction or fittings.

Double compartment; a scabbard design with two separate sections or chambers.

Double-ridged construction; a blade shape with shinogi ridges on both sides of the blade.

Both sides or flanks; refers to bilateral features or mounting elements on a sword.

Dragon character or dragon-form calligraphy used in sword inscriptions and decorative elements.

Founder of the Samonji school in Chikuzen. Known for bold Soshu-influenced style with prominent nie.

Rust or corrosion on metal surfaces, particularly on sword blades and fittings.

Fixed or established; often used in context of confirmed attributions or established characteristics of a blade.

Brilliant clarity and sharpness in the hamon and overall blade appearance.

Bright, clear, and vivid; describes a well-defined hamon.

Sagami Province; a region in present-day Kanagawa Prefecture, home to the Soshu tradition.

The cord attached to the scabbard for securing to the belt.

A broken or fragmented hamon pattern, often considered a flaw in the heat treatment.

Broken or chipped blade; damage to the cutting edge or blade body.

Supreme sharp blade; the highest cutting ability classification, reserved for blades of legendary sharpness.

Reverse or opposite direction; often used to describe inverted grain or pattern flow.

Reversed or slanting ashi.

Reverse clove pattern; a hamon with chōji-like formations that lean backward against the cutting edge.

Inverted clove-shaped irregular hamon pattern where the chōji forms point downward.

Reverse or upward slanting file marks on the nakago, opposite to normal direction.

Reverse hanging; describes elements that curve or extend in the opposite expected direction.

Reverse-inclined; describing features that curve or lean in the opposite direction.

Reverse spirit; an inverted or contrary quality in the blade's appearance or structure.

Reverse gunome pattern; irregular hamon with wave-like formations pointing backward.

Reverse irregular pattern; a hamon with waves or patterns flowing opposite to normal.

Reverse or inverted; describes features oriented opposite to the normal direction.

Reverse or inverted tendency; pattern elements appearing in opposite direction.

Reverse grip; holding a weapon with the blade pointing downward or backward.

Tip or point; refers to the forward end or extremity of blade features.

A tang tip shape that resembles the point of a sword blade.

A blade that has been shortened from the tip, altering the original kissaki geometry.

Chestnut-shaped tang tip; a rounded, bulbous nakago-jiri form.

Tip pinching; a defect where the blade point appears compressed or narrowed.

Point swelling; widening of the blade toward the tip, creating a fuller point section.

Tassel or cord ornament attached to the end of sword knots or sageo.

The point where the ridge line (shinogi) disappears near the tip of the blade.

The subtle transition area where the shinogi begins to fade toward the point.

Tip uncertainty; refers to questionable or problematic condition of the sword point.

The width of the blade near the point.

Senior examiner; high-ranking official responsible for authenticating and evaluating sword quality.

Cut or shortened tip; a blade that has been repointed or had its tip altered.

Pointed chestnut end; a nakago-jiri (tang end) shaped like a tapered chestnut with a sharp point.

Curvature concentrated toward the point.

Made by; indicates the maker or school attribution of a sword or fitting.

Individual style or characteristic workmanship of a particular smith or school.

Left capital; geographic designation often found in swordsmith names or signatures.

Rayskin; the textured skin used to wrap handles.

Ray skin wrapping; the rough shark or ray skin used under the cord wrap on sword handles.

A Chikuzen Province school founded by Sa. Known for Soshu-influenced work and powerful hamon.

Three flat surfaces; refers to a triangular cross-section or three-sided geometric form.

Three-layer construction method in sword forging with distinct steel compositions.

Three-cedar pattern; groups of three pointed elements.

A traditional Japanese measurement unit equal to approximately 3mm, commonly used in sword specifications.

A measurement system using three-bu increments (approximately 9mm), commonly used in sword proportions and specifications.

Third generation; indicates the third smith in a lineage to use a particular name.

An early Yamashiro school in Kyoto, legendary for Sanjo Munechika. Active in late Heian period.

Triple-layered edge pattern; hamon showing three distinct hardened zones.

Triple-pronged vajra sword; a Buddhist ritual sword carving with a three-pronged hilt.

Three-pronged vajra handle sword; ritual blade with Buddhist three-pronged thunderbolt handle design.

Three-pronged ritual sword; a Buddhist ceremonial blade with triple-pointed design.

Three-pronged ritual sword based on Buddhist vajra symbolism.

Three-pronged handle sword; a ritual blade with a vajra-style handle used in Buddhist ceremonies.

Ritual sword with three-pronged vajra handle, used in Buddhist ceremonies.

Three-pronged vajra sword; a ritual blade with Buddhist vajra symbolism featuring triple points.

Three grades; classification system ranking sword quality into upper, middle, and lower tiers.

A boshi style characteristic of three famous Osafune smiths (Nagamitsu, Kagemitsu, Sanenaga), featuring a straight temper line through the kissaki with a small turn-back.

Japanese pepper; used to describe small, granular patterns resembling pepper seeds.

Pepper things; decorative motifs featuring Japanese pepper plants or similar botanical designs.

Variant spelling of sanshōmono; reference pieces used for comparative study.

Reference pieces or comparative examples used for authentication and study purposes.

Three-layer construction method; refers to blades made with three distinct steel layers.

The three main sword mountings: kozuka, kōgai, and menuki collectively.

Three irons; construction method using three different types of steel or iron.

Rod or pole; refers to the central shaft portion of various sword components.

Monkey hand; a type of tsuba design featuring openwork resembling a monkey's paw.

Bamboo leaf spear; a type of spear with a leaf-shaped blade resembling bamboo.

Small ripple pattern, typically referring to subtle wave-like formations in blade geometry.

The outer side when the blade is thrust through the belt (for katana).

Blade worn thrust through the obi; katana or wakizashi in formal mounting.

Companion sword worn thrust through the obi alongside the main sword.

The inner side when the blade is thrust through the belt.

Primary side of the blade showing distinct hamon characteristics for identification.

Finger-like projections; small pointed extensions from the hamon into the ji area.

Fine wave pattern in the hamon resembling small, gentle ripples on water.

Scabbard; the sheath that holds the blade.

The curvature of a scabbard that matches the blade's curve for proper fit.

Scabbard inscription; attribution and description written on a shirasaya (storage scabbard) by a recognized expert. The authority of a sayagaki depends entirely on who wrote it. Inscriptions by Honma Kunzan or Tanobe Michihiro are highly valued, while those by less recognized individuals carry little weight. A sayagaki typically includes the smith attribution, blade characteristics, measurements, and date of examination.

Interlocking geometric pattern; continuous swastika-like design used on scabbard wrapping.

Blue ocean waves; decorative pattern of overlapping semicircular wave motifs.

Clear and cool; aesthetic term describing refined, elegant blade appearance.

Swords made in Seki province; blades produced by smiths from the Seki school tradition.

Soft metal spacers (typically copper) fitted into the nakago-ana of a tsuba to provide a snug fit to a specific blade's tang.

Attacking metal fittings; decorative metalwork on scabbards depicting aggressive or martial themes.

Reinforcing metal fittings that strengthen joints and stress points in sword mountings.

Pressure fitting; metal collar or ring used to secure components in sword mountings.

Pressure metal; reinforcing metal bands or fittings applied under tension or pressure.

File marks creating a thousand-step pattern, a decorative surface treatment on sword fittings.

Lengthwise file marks parallel to the tang.

Spacers placed on either side of the tsuba.

The platform or seat area on the tsuba where the seppa (spacers) rest against the guard.

Cutting or severing; refers to a blade's cutting ability or a break in the steel.

Cut signature; a mei (signature) that has been partially removed due to tang shortening.

Snow, moon, and flowers; classical decorative theme representing natural beauty.

Explanation; the descriptive text accompanying a sword evaluation.

Traditional Japanese unit of length equal to approximately 30.3 centimeters or one foot.

An alloy of copper and gold, patinated to a deep blue-black.

Crystalline formations in the steel; small, bright metallic inclusions in the blade.

Metal fitting used to secure or tension the cord wrapping on sword handles.

Metal fittings used for cord or rope pulling mechanisms in traditional Japanese equipment.

Wrinkled leather wrap used on sword handles, creating a textured grip surface.

Astringent quality; refers to a refined, understated aesthetic quality in sword appreciation.

Subtle elegance; refined, understated beauty that reveals itself through careful observation.

An alloy of copper and silver, patinated to grey.

Autumn rain file marks; a specific pattern of file marks on the nakago resembling rainfall.

Four gentlemen; decorative motif featuring plum, orchid, chrysanthemum, and bamboo.

Striped edge; a hamon pattern showing distinct parallel bands or stripes.

Island-like core pattern; irregular patches of hard steel within the hamon structure.

Island-like; describes isolated patches or island-like formations in hamon or hada.

Tightness or compactness; describes well-forged steel with good cohesion and density.

Tightening quality; well-controlled, compact steel structure showing discipline.

Tightening spirit; the quality of having a well-controlled, compact blade structure.

Tight; describes a compact, well-controlled hamon.

Stains or discoloration on the blade surface, often from age or improper storage.

True or formal; the highest level of formality in artistic styles and presentations.

True or straight file marks; parallel file strokes running perpendicular to the tang.

Bend; curvature caused by lateral stress.

Brass alloy used in sword fittings and decorative elements, composed of copper and zinc.

True essence or authentic quality; refers to the genuine characteristics of a blade.

Hidden hole; a concealed opening in sword fittings, often for practical purposes.

The ridge line running along the blade that divides the ji (flat) from the shinogi-ji.

Width of the shinogi ridge area; measurement from shinogi to mune.

Groove carved along the shinogi ridge line to reduce weight and add flexibility.

The flat area between the shinogi and the mune.

Base of the ridge line; area where the shinogi begins near the habaki.

The ridge line running along the blade's spine; the shinogi's linear profile.

The most common blade construction with a distinct ridge line (shinogi) running along the blade.

Bamboo-joint cut file marks; a specific pattern of horizontal file marks.

Examination or judging; the formal NBTHK process of evaluating swords for certification.

New-new sword; blades made approximately 1781-1868 (end of Edo period), characterized by revival of koto techniques.

Divine speed pattern; a type of decorative motif suggesting swift, divine movement.

Truly forged work; indicates authentic craftsmanship in traditional sword-making methods.

New sword; blades made from approximately 1596-1781, characterized by new forging methods after the unification of Japan.

Shintogo Kunimitsu; a Soshu smith who studied under Masamune. Known for fine tanto and wakizashi.

Tide or flow; refers to the natural movement or pattern in the steel grain.

Salt neck; a defect where the nakago shows corrosion or pitting from salt exposure.

Seven treasures inlay; decorative metalwork technique using multiple colored metals.

White appearance or pale coloration in steel, often indicating specific heat treatment.

Whitish appearance in the steel; a pale, cloudy quality in the metal structure.

Whitish, faint utsuri.

To become white or pale; describes areas of the blade that appear whitish due to polishing or metallurgical issues.

Plain wooden scabbard; undecorated storage mounting made of magnolia wood for blade preservation.

Buttocks or rear end; in sword terminology, refers to the bottom or tail end of components.

Plain wooden storage scabbard used to protect a blade when not in formal mounting.

White staining; discoloration or patina that appears as whitish marks on the blade.

White ray skin used for wrapping sword handles and scabbards.

Sunken relief carving.

A purple-tinged coloration that can appear in the steel of certain sword blades, often considered aesthetically desirable.

Lower cord; the braided cord used to secure the scabbard to the obi or belt.

Four Heavenly Kings; refers to four master swordsmiths of exceptional skill.

A Mino school descended from Soshu tradition via Kaneuji. Known for hitatsura and bold nie.

A sunken or subdued appearance in the hamon or steel grain pattern.

Subdued temper; a hamon with restrained, subtle activity in the steel.

Iris flower motif commonly used in sword decoration and seasonal themes.

Iris leather; leather with a pattern or texture resembling iris plant leaves.

Similar to shinogi-zukuri but without a yokote line, giving a continuous curve to the point.

First generation founder of a smithing lineage or school.

Small protruding form; a minor raised or projecting element in sword construction or fittings.

First transmission; early teachings or foundational techniques of a sword school.

Private estate system in medieval Japan that influenced sword production and ownership.

Flickering candle-like appearance in the hamon with small, dancing flame patterns.

Small melon-shaped design, typically referring to tsuba or other fitting outlines.

Genuine work; an authentic blade confirmed to be by the smith whose signature it bears.

Showa era (1926-1989); period designation used in sword dating and classification.

Red lacquer signature; attribution written in red lacquer, typically by Hon'ami appraisers during the Edo period. Applied to ubu (unshortened) nakago where gold inlay was not appropriate. Less permanent than kinzogan-mei but still a respected form of attribution when by a recognized authority.

Red lacquer attribution; post-Edo period variant of shu-mei. Unlike traditional shu-mei which was applied during the Edo period on ubu nakago, shu-sho refers to later attributions in red lacquer. Generally considered less authoritative than historical shu-mei.

Deputy military governor; historical title relevant to sword commissioning and ownership.

A temple name sometimes found inscribed on sword tangs, indicating religious dedication.

Master craftsman or head of a sword-making workshop or school.

Workshop or place of sword repair and restoration activities.

Main occupation or primary craft; refers to a swordsmith's principal profession.

Buddhist monk; often appears in sword maker names or signatures indicating religious status.

Complete set of sword mountings; all metal fittings for a particular koshirae.

Overall curvature; the total curve of a blade from tang to tip.

Rustic style; a simple, unpretentious aesthetic quality lacking refinement or sophistication.

Traditional transmission of techniques and knowledge passed down through generations within a school.

Traditional Bizen school style; refers to classical Bizen forging techniques and aesthetics.

Secondary groove; a smaller groove running parallel to the main hi (fuller).

Companion groove; a shorter groove alongside another.

Additional inscription on the tang, often added later to supplement the original signature.

Accompanying letter or certificate that provides attribution or authentication details.

Added signature; secondary inscription on nakago, often by later appraiser or owner.

Shaving or paring; refers to reduction of material through careful removal or cutting.

Complete set of metal fittings for sword mountings, including all hardware components.

Paired swords; matching set of two blades made as a coordinated pair.

Grass-foot style; a decorative pattern resembling grass or plant tendrils at the base.

Plain pattern; simple, undecorated design or surface without elaborate ornamentation.

School lineage or group of smiths sharing common techniques and stylistic characteristics.

Curvature or bend in a blade; the degree of curve from tang to tip.

The curvature of the blade.

A matched set of fittings.

Cursive script style of calligraphy used in informal inscriptions and signatures.

Sagami Province tradition; the Kamakura school.

Sagami Province sword school tradition known for notare hamon and distinctive tempering.

Swords made in the Sōshū school tradition, known for their distinctive hamon patterns and steel characteristics.

Plain copper.

Bamboo-blind pattern; vertical streaks in the hamon.

Bamboo-blind pattern; vertical streaks in the hamon resembling a rolled bamboo blind. Alternate form of sudare-ba.

Late Aoe school; the final period of the Aoe school of swordsmiths in Bitchu province.

Late Bizen school; swordsmiths from Bizen province during the late Kamakura to Muromachi periods.

Late period Seki school swordsmiths, referring to those working after the peak Muromachi era.

Late Sōshū school; the final period of the Sagami province sword school.

Late Sōshū school works; swords made in the declining period of the Sōshū tradition.

Ceramic-like patterns or textures appearing in the blade's surface treatment.

Inlay technique using contrasting metals; creates decorative patterns in sword fittings.

Overall shape and proportions of a blade; the fundamental form and silhouette.

Straight; the boshi runs straight to the point.

Straight or direct style; refers to a linear, undecorated approach in sword design or fittings.

Straight-hearted; a hamon that is predominantly straight with minimal undulation.

Straight insertion; a tang that enters the handle in a direct, linear manner.

Straight reflection pattern in the steel, appearing as parallel lines running along the blade.

Straight temper line; a hamon that runs in a relatively straight line along the blade.

Straight temper line running parallel to the edge.

Straight temper line tendency; primarily straight with slight variations.

Straight-hamon construction; a blade forged specifically to produce a straight temper line.

Straight hamon with small irregular variations; a subtle wavy pattern in the temper line.

Plain skin; steel surface with minimal visible grain pattern or forging marks.

A type of straight sword with fine, hair-like grain patterns resembling water streams.

Cross-hatched or intersecting file marks.

Streaked grain; steel texture showing distinct linear patterns running lengthwise.

Diagonal file marks.

Diagonal file marks; yasurime pattern running at an angle across the nakago surface.

Openwork; pierced or cut-through design.

Openwork carving; decorative grooves that pierce completely through the blade.

Openwork carving; decorative technique creating pierced or hollow patterns in metal.

Assistant or deputy; common element in smith names indicating rank or lineage.

Sukemasa crest; family mon associated with the Sukemasa lineage of swordsmiths.

Plain sword; simple sword carving without elaborate details.

Transparent emergence; subtle hamon activity that appears to emerge faintly from the steel.

Relief carving technique where the background is carved away, leaving raised designs.

Relief carving with openwork; raised carving combined with cut-through sections.

Remaining edge of a groove; the raised border left when carving horimono that doesn't reach the blade edge.

Charcoal-like grain pattern; dark, carbon-rich areas in the steel surface.

Charcoal-like grain pattern in the steel surface, appearing as dark streaks or patches.

Clear steel; describes exceptionally pure, clean-appearing steel with minimal visible grain structure.

Traditional Japanese unit of length equal to approximately 3.03 centimeters or 1.19 inches.

Extended length, longer than the standard for the blade type.

Shortened or compressed proportions, describing a blade that appears truncated.

Shortened length, shorter than the standard for the blade type.

Flowing sand; sweeping lines of nie in the hamon.

Sand-grain inlay technique using fine metal particles to create textured decorative surfaces.

Length extension; the process of lengthening a blade through careful forging and drawing.

Natural stretching spirit; describes the inherent flexibility and resilience in well-forged steel.

Dark reddish-brown lacquer color; named after Suo Province's traditional hue.

Shortened tang; the blade has been cut down.

Shortened signature; maker's inscription remaining after tang shortening or blade modification.

Pampas grass; decorative motif often found in horimono or tsuba designs.

Cricket pattern; a hamon with small, regular formations resembling cricket shapes.

A long sword worn edge-down, suspended from the belt. The primary battlefield sword of the Heian through Muromachi periods.

Tachi-style mountings for a suspended sword.

Tachi signature; a mei inscribed on the side facing outward when worn edge-down.

The front face of a tachi when worn edge-down; the side facing outward from the body.

The overall shape and proportions characteristic of a tachi sword, typically with greater curvature than katana.

The reverse side of a tachi when worn edge-down; typically the side without or with less elaborate decoration.

A Hizen Province school founded by Hashimoto Tadayoshi. Known for refined Shinto-era blades.