NihontoWatchNihontoWatch鑑定書内容:財)日本美術刀剣保存協会 特別保存刀装具[N.B.H.K]Tokubetsu Hozon Tousougu 江戸時代、横谷系石黒派の頭領、石黒政常作二所の特別保存刀装具指定作品。石黒政常は、横谷門下柳川派の加藤直常の門人である。宝暦十年に生まれ、通称は善蔵、のちに周助と改め、日本橋の呉服町に住み、安永の頃の金工銘は是常といったというが作品は見られない。いつ頃、政常と改めたかは定かでないが、政常の名は師加藤直常と柳川派の祖直政から一字ずつ貰って政常と名乗っている。石黒門下には政美・政明をはじめ、是常・政英・政広など多くの上手が名を連ねている。政常は雅号を東嶽子(のち東岳子)といい、還暦を迎えてからは「石黒斎寿命政常(花押)」と銘をきったという。本作は銘から還暦前の作品で小柄、笄に飛翔する禽(とり)を描き、躍動感あふれる構図と端正な鏨使いにより、静と動の緊張感が巧みに表現されている。魚々子地の細密さと彫技により立ち上がった羽の起伏、さらに金象嵌による輝きが一体となって総じて優美な作品となっている。
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Ishiguro Masatsune I
Enkyō-Bunsei (1746/1760-1828)
Signed
Tokuho (NBTHK)
(Translation unavailable)
Machibori · Musashi
1 piece on the market now
Ishiguro Masatsune (stone inscription: 石黒政常), born in Horeki 10 (1760), was the founding master of the Ishiguro school of metalworkers and one of the most celebrated machibori (town-carving) artists of the late Edo period. He first apprenticed under Kato Naotsune of the Yanagawa branch, and subsequently studied with Yanagawa Naomasa himself, both part of the broader Yokoya lineage. Upon establishing independence, Masatsune combined one character from each teacher's name — masa (政) from Naomasa and tsune (常) from Naotsune — to form his professional name. He used the art names Togakushi (東嶽子, later written 東岳子) and, after passing the age of sixty, signed works as "Ishiguro-sai Jumyo Masatsune." His school attracted many gifted pupils, including Masayoshi, Masaaki, Koretsune, Masahide, and Masahiro, and the Ishiguro lineage continued to flourish through successive generations into the Meiji period. He died in Bunsei 11 (1828) at the age of sixty-nine.
Masatsune's technical command encompassed the full repertoire of the kinko metalworker. His favored ground was shakudo finished with an impeccably regular nanako-ji, praised in designation records for its orderly precision. Upon this deep-black surface he executed designs primarily in takabori (high relief) enriched with iroe (polychrome inlay), deploying a remarkable palette of colored metals — gold, silver, shibuichi, suaka (scarlet copper), oborogin, and hi-irodo — to achieve effects of brilliant yet controlled chromatic richness. His menuki demonstrate equal mastery of yobori (sculptural carving) and nikubori (fleshed relief) on solid gold grounds, often employing okigane (applied metal) and suemon-zogan (applied inlay). A pair of dragon menuki reveals his command of the dashi-keshi method and precise sankaku-tagane (triangular chisel) work adapted from the Goto iebori tradition. Whether rendering the minutely differentiated plumage of a raptor, the undulating force of ocean waves expressed through polished relief with gold and silver ro-zogan (dew inlay), or the delicate color gradations in a pheasant's breast, Masatsune's chisel strokes are characterized by an honest, finely detailed manner and a clean final polish that imparts an air of dignified refinement.
Masatsune's artistic significance rests upon his transformation of the Yanagawa manner into a distinctly personal idiom centered on bird-and-flower subjects and birds of prey — themes that became the hallmarks of his school. His compositions make masterful use of open space, creating what the NBTHK examiners repeatedly describe as a "clear and limpid spirit." Yet within this decorative brilliance there persists a martial vigor suited to warrior taste, a quality that distinguishes the first generation's work from the more purely ornamental output of later Ishiguro artists. His oeuvre spans tsuba, fuchi-kashira, kozuka, kogai, menuki, and complete soroe-kanagu sets, demonstrating equal facility across every format of sword fitting. As an artist who bridged the Yokoya lineage's classical discipline and the expressive naturalism of the Bunka-Bunsei cultural efflorescence, Masatsune stands among the foremost representative metalworkers of Edo-period Japan.
Where Masatsune stands among comparable artisans: across all of nihontō, and within tradition, era, and period. The tiers (Foremost · Leading · Major · Notable) weigh official designations from the NBTHK and Japan's Agency for Cultural Affairs, together with historical honors of lasting repute such as the Sansaku and Meibutsu-chō.
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Machibori · Edo
19 pieces on the market now
The Ishiguro school was founded by Ishiguro Masatsune, born in Horeki 10 (1760), who trained under Kato Naotsune and Yanagawa Naomasa within the broader Yokoya lineage before establishing an independent atelier that would become one of the most celebrated machibori ("town carving") workshops of the late Edo period. Masatsune combined one character from each teacher's name to form his professional identity, and under the art name Togakushi he attracted a succession of gifted pupils -- Masayoshi, Masaaki, Koretsune (his eldest son), Koreyoshi, Masahide, and Masahiro -- who carried the school's distinctive manner through the final decades of the Tokugawa period and into the Meiji era. Centered in Edo, the Ishiguro lineage operated within the machibori sphere, producing fittings for discerning warrior-class and merchant patrons rather than under the hereditary commissions of the Goto iebori tradition, a commercial independence that fostered pictorial ambition and technical innovation. The collective technical identity of the Ishiguro school is defined by a painterly naturalism executed through takabori upon shakudo nanako-ji grounds, enriched by lavish polychrome iroe employing an unusually wide palette of colored metals -- gold, silver, shibuichi, suaka (scarlet copper), oborogin, and hi-irodo. The school's signature subjects are kacho-zu (flowers and birds), rendered with a naturalistic, sketch-like fidelity grounded in close observation from life. Masatsune established this direction, transforming the Yanagawa manner into a personal idiom centered on birds of prey and bird-and-flower compositions that became the hallmarks of the house. His works are characterized by an "honest, finely detailed manner" and a "clear and limpid spirit" achieved through masterful use of open space. Masayoshi, who succeeded as third head, brought the school's painterly idiom to its fullest expression: front and reverse surfaces are linked through continuous branches and contrasting water motifs, male and female birds are paired with deliberate compositional care, and the interplay of a-un expression lends narrative depth to each scene.
His compositions on iron migaki-ji grounds demonstrate equal command, with kin-sunago zogan evoking atmospheric haze. " Koretsune served as vital link between the founder and the school's later flourishing, with takabori described as "dignified and sumptuous, yet steadfast and reliable," and a command of perspective achieved by subtly modulating surface depth. Koreyoshi, credited with ability "surpassing that of his father" Masayoshi, brought the school's character to its fullest late-period expression, producing work likened to the nishiki-e color woodblock prints of the age. The Ishiguro school's significance within the tosogu canon rests upon its transformation of the Yokoya-Yanagawa classical discipline into a pictorial art of extraordinary chromatic richness and compositional sophistication. Where earlier metalworking traditions relied predominantly on monochrome shakudo or gold tonalities, the Ishiguro masters deployed polychrome iroe with a sumptuousness "that never lapses into vulgarity" -- a balance of brilliance and restraint that defines the school's aesthetic. Masatsune's founding generation retained a martial vigor suited to warrior taste that distinguished his work from the "more purely ornamental output of later Ishiguro artists," while the successive generations of Masayoshi, Masaaki, and Koreyoshi progressively refined the school's decorative vocabulary toward an opulence that mirrored the cultural efflorescence of the Bunka-Bunsei era. Complete soroe-kanagu sets and unified issaku suites represent the school's highest achievement, demonstrating rigorous thematic coherence across every component of a mounting. The NBTHK has consistently praised the school's finest works as pieces in which "the Ishiguro school's distinctive character" is left "nothing unexpressed," and the tradition's enduring legacy is that of a workshop which, across four generations, brought the art of polychrome metalwork to its most accomplished and visually resplendent expression in Edo-period Japan. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Masayoshi政美 | — | 30 |
| Masatsune政常 | — | 17 |
| Masaaki政明 | — | 18 |
| Koretsune是常 | — | 4 |
| Koreyoshi是美 | — | 4 |
A Hozon-certified fitting of notably superior craftsmanship and condition, often with signature or workmanship of high reference value.
The NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords) is a public-interest incorporated foundation founded in 1948 and supervised by Japan’s Agency for Cultural Affairs (Bunkachō); it is based at the Japanese Sword Museum in Tokyo. Its expert panels physically examine each submitted work (shinsa) and issue a certificate (kanteishō) ranking it by artistic and historical merit. NBTHK papers are the most widely recognized standard of authentication for Japanese swords and fittings.
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