NihontoWatch Mon

NihontoWatchBETA

MarketAuctions
Encyclopedia
NihontoWatch Mon

NihontoWatchBETA

MarketAuctions
Encyclopedia

Description

This is a tanto signed Gassan from the Dewa province, dating back to the Tenbun era (1532-1554) of the late Muromachi period. It features an Ayasugi hada and comes with a koshirae and shirasaya. The blade has a distinctive two-character signature.

NihontoWatch MonNihontoWatchBETA
MarketAuctionsEncyclopedia
Swords›Gassan›Dewa›Tanto: Gassan
tantoTokubetsu Hozon
Gassan School

Tanto: Gassan

mei · Kenkyu (1190-1199) · nagasa 24.7cm

SOLD
Gassan School — 1 of 14
Gassan School — 2 of 14
Gassan School — 3 of 14
Gassan School — 4 of 14
Gassan School — 5 of 14
Gassan School — 6 of 14
Gassan School — 7 of 14
Gassan School — 8 of 14
Gassan School — 9 of 14
Gassan School — 10 of 14
Gassan School — 11 of 14
Gassan School — 12 of 14
Gassan School — 13 of 14
Gassan School — 14 of 14
1 / 14
1 / 14
Gassan School — 1 of 14Gassan School — 2 of 14Gassan School — 3 of 14Gassan School — 4 of 14Gassan School — 5 of 14Gassan School — 6 of 14Gassan School — 7 of 14Gassan School — 8 of 14Gassan School — 9 of 14Gassan School — 10 of 14Gassan School — 11 of 14Gassan School — 12 of 14Gassan School — 13 of 14Gassan School — 14 of 14
Measurements & details
Smith
Gassan School
Type
Tanto
School
Gassan
Period
Kenkyu (1190-1199)
Province
Dewa
Signature
Signed
Measurements
Nagasa 24.7cmMotohaba 2.33cmKasane 0.49cm
Description

This is a tanto signed Gassan from the Dewa province, dating back to the Tenbun era (1532-1554) of the late Muromachi period. It features an Ayasugi hada and comes with a koshirae and shirasaya. The blade has a distinctive two-character signature.

About the school

Gassan

月山

Wakimono · Dewa

49 pieces on the market now

›

Mount Gassan rises among the Dewa Sanzan, the three sacred peaks of northern Japan bound to the mountain asceticism of Shugendō, and the swordsmiths who took the mountain's name worked in its shadow in Ōshū, Dewa Province. The setsumei record that smiths signing "Gassan" are noted in the Kanchiin-bon Meizukushi as early as the Heian period, and the lineage's oldest surviving signed blade is a tachi simply signed Gassan, kept at the Gassan Shrine and judged to date from the late Nanbokuchō to early Muromachi period. Learn more →

8 recorded smiths10 designated works
Leading smiths
SmithEraDesignated
Naonori直則1830-18440
Toshiyasu俊安1504-15210
Nagahisa長久1334-13380
Kiyoyasu清安1532-15550
Tomosada友定1532-15550
Explore the Gassan school →
NBTHK Certificate
Tokubetsu Hozon Tōken特別保存刀剣
Sword Especially Worthy of Preservation
›

A Hozon-certified blade judged to show notably superior workmanship and a better state of preservation. The bar is higher: re-tempered blades and most unsigned Muromachi/Edo works are excluded.

About the NBTHK›

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.

NBTHK official site→
Seller
C
Choshuya
🇯🇵Ships from Japan
›
✓Verified dealerwww.choshuya.co.jp
✓Ships worldwide✓English support
Return policy

If, due to our fault, the item differs significantly from its proper condition, the item may be returned. Cooling-off is within one week of the item's arrival.

View all of Choshuya’s listings→View this item on the dealer’s site→

Previously sold — Gassan School

Samurai Museum
Tokuho
Tanto - Tokuho - by Gassan School - Modern Japanese Sword Tanto Signed by Sadakazu NBTHK Tokubetsu Hozon CertificateTanto - Tokuho - by Gassan School - Modern Japanese Sword Tanto Signed by Sadakazu NBTHK Tokubetsu Hozon Certificate
Sold

Tantō

ByGassan School
SOLD
Choshuya
Tanto - by Gassan School - Mei: Mikami Sadanao Saku, Heisei 3rd Year Mid-AutumnTanto - by Gassan School - Mei: Mikami Sadanao Saku, Heisei 3rd Year Mid-Autumn
Sold

Tantō

ByGassan School
SOLD
Giheiya
Katana - by Gassan School - Gendaito Katana: Kawai Minamoto Sadaharu with KoshiraeKatana - by Gassan School - Gendaito Katana: Kawai Minamoto Sadaharu with Koshirae
Sold

Katana

ByGassan School
SOLD
Choshuya
Tanto - by Gassan School - Ubu-nakago Mumei GassanTanto - by Gassan School - Ubu-nakago Mumei Gassan
Sold

Tantō

ByGassan School
SOLD
Choshuya
Katana - by Gassan School - Taia Gassan SadakazuKatana - by Gassan School - Taia Gassan Sadakazu
Sold

Katana

ByGassan School
SOLD
Choshuya
Tanto - by Gassan School - Japanese Sword for Sale | Ginza Choshuya | Ubu-nakago Mumei Gassan, 1481Tanto - by Gassan School - Japanese Sword for Sale | Ginza Choshuya | Ubu-nakago Mumei Gassan, 1481
Sold

Tantō

ByGassan School
SOLD
Aoi Art
Tokuho
Tanto - Tokuho - by Gassan School - Gassan Sadayoshi - Banzairaku InscriptionTanto - Tokuho - by Gassan School - Gassan Sadayoshi - Banzairaku Inscription
Sold

Tantō

ByGassan School
SOLD
Choshuya
Wakizashi - by Gassan School - Gassan Kaneyasu SakuWakizashi - by Gassan School - Gassan Kaneyasu Saku
Sold

Wakizashi

ByGassan School
SOLD

More from the Gassan school

View all →
Token-Net
Tokuho
Katana - Tokuho - by Gassan Sadakatsu - Gassan Seiren Saku (Osaka) made in November, Showa 10 (1935) - Commemorating the Birth of Imperial PrinceKatana - Tokuho - by Gassan Sadakatsu - Gassan Seiren Saku (Osaka) made in November, Showa 10 (1935) - Commemorating the Birth of Imperial Prince

Katana

ByGassan Sadakatsu
¥2,150,000
Aoi Art
Tokuho
Tanto - Tokuho - by Gassan Sadakatsu - Osaka ju Gassan Sadakatsu Kinsaku (kao) A lucky day in May, Showa 9 (1934). , accompanied by a maki-e lacquer box.Tanto - Tokuho - by Gassan Sadakatsu - Osaka ju Gassan Sadakatsu Kinsaku (kao) A lucky day in May, Showa 9 (1934). , accompanied by a maki-e lacquer box.

Tantō

ByGassan Sadakatsu
¥2,000,000
Toyuukai
Tokuho
Tanto - Tokuho - by Gassan School - Gassan - NBTHK Tokubetsu KichoTanto - Tokuho - by Gassan School - Gassan - NBTHK Tokubetsu Kicho

Tantō

ByGassan School
¥500,000
Touken Matsumoto
Tokuho
Katana - Tokuho - by Gassan Sadaharu - Kenryushi Fujiwara Sadaharu - Keio Gannen (1865)Katana - Tokuho - by Gassan Sadaharu - Kenryushi Fujiwara Sadaharu - Keio Gannen (1865)

Katana

ByGassan Sadaharu
¥1,000,000
Tsuruginoya
Katana - by Gassan Sadayoshi - Enomoto Sadayoshi, Showa 53rd YearKatana - by Gassan Sadayoshi - Enomoto Sadayoshi, Showa 53rd Year

Katana

ByGassan Sadayoshi
¥850,000
Toyuukai
Hozon
Tanto - Hozon - by Gassan Sadayoshi - Fuyou Asahi, Ansei Hebidoshi 8gatsuhi (Attributed to Gassan Sadayoshi) [NBTHK Hozon]Tanto - Hozon - by Gassan Sadayoshi - Fuyou Asahi, Ansei Hebidoshi 8gatsuhi (Attributed to Gassan Sadayoshi) [NBTHK Hozon]

Tantō

ByGassan Sadayoshi
¥400,000
Touken Matsumoto
Tokuho
Katana - Tokuho - by Gassan Naonobu - Yonezawa NaonobuKatana - Tokuho - by Gassan Naonobu - Yonezawa Naonobu

Katana

ByGassan Naonobu
¥550,000
Hyozaemon
Hozon
Tanto - Hozon - by Gassan School - Gassan Masanori - Beautiful Ayasugi HadaTanto - Hozon - by Gassan School - Gassan Masanori - Beautiful Ayasugi Hada

Tantō

ByGassan School
¥880,000

Swords

  • Katana
  • Wakizashi
  • Tantō
  • Tachi
  • Naginata
  • Yari

Fittings

  • Tsuba
  • Fuchi-Kashira
  • Kozuka
  • Menuki

By Certification

  • Tokujū
  • Jūyō
  • Tokuho
  • Hozon

Resources

  • Dealer Directory
  • Artist Directory
  • Glossary
  • Browse All
Nihontowatch© 2026
TermsPrivacyCookiesAbout

Description

This is a tanto signed Gassan from the Dewa province, dating back to the Tenbun era (1532-1554) of the late Muromachi period. It features an Ayasugi hada and comes with a koshirae and shirasaya. The blade has a distinctive two-character signature.

NihontoWatch MonNihontoWatchBETA
MarketAuctionsEncyclopedia
Swords›Gassan›Dewa›Tanto: Gassan
tantoTokubetsu Hozon
Gassan School

Tanto: Gassan

mei · Kenkyu (1190-1199) · nagasa 24.7cm

SOLD
Gassan School — 1 of 14
Gassan School — 2 of 14
Gassan School — 3 of 14
Gassan School — 4 of 14
Gassan School — 5 of 14
Gassan School — 6 of 14
Gassan School — 7 of 14
Gassan School — 8 of 14
Gassan School — 9 of 14
Gassan School — 10 of 14
Gassan School — 11 of 14
Gassan School — 12 of 14
Gassan School — 13 of 14
Gassan School — 14 of 14
1 / 14
1 / 14
Gassan School — 1 of 14Gassan School — 2 of 14Gassan School — 3 of 14Gassan School — 4 of 14Gassan School — 5 of 14Gassan School — 6 of 14Gassan School — 7 of 14Gassan School — 8 of 14Gassan School — 9 of 14Gassan School — 10 of 14Gassan School — 11 of 14Gassan School — 12 of 14Gassan School — 13 of 14Gassan School — 14 of 14
Measurements & details
Smith
Gassan School
Type
Tanto
School
Gassan
Period
Kenkyu (1190-1199)
Province
Dewa
Signature
Signed
Measurements
Nagasa 24.7cmMotohaba 2.33cmKasane 0.49cm
Description

This is a tanto signed Gassan from the Dewa province, dating back to the Tenbun era (1532-1554) of the late Muromachi period. It features an Ayasugi hada and comes with a koshirae and shirasaya. The blade has a distinctive two-character signature.

About the school

Gassan

月山

Wakimono · Dewa

49 pieces on the market now

›

Mount Gassan rises among the Dewa Sanzan, the three sacred peaks of northern Japan bound to the mountain asceticism of Shugendō, and the swordsmiths who took the mountain's name worked in its shadow in Ōshū, Dewa Province. The setsumei record that smiths signing "Gassan" are noted in the Kanchiin-bon Meizukushi as early as the Heian period, and the lineage's oldest surviving signed blade is a tachi simply signed Gassan, kept at the Gassan Shrine and judged to date from the late Nanbokuchō to early Muromachi period. Learn more →

8 recorded smiths10 designated works
Leading smiths
SmithEraDesignated
Naonori直則1830-18440
Toshiyasu俊安1504-15210
Nagahisa長久1334-13380
Kiyoyasu清安1532-15550
Tomosada友定1532-15550
Explore the Gassan school →
NBTHK Certificate
Tokubetsu Hozon Tōken特別保存刀剣
Sword Especially Worthy of Preservation
›

A Hozon-certified blade judged to show notably superior workmanship and a better state of preservation. The bar is higher: re-tempered blades and most unsigned Muromachi/Edo works are excluded.

About the NBTHK›

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.

NBTHK official site→
Seller
C
Choshuya
🇯🇵Ships from Japan
›
✓Verified dealerwww.choshuya.co.jp
✓Ships worldwide✓English support
Return policy

If, due to our fault, the item differs significantly from its proper condition, the item may be returned. Cooling-off is within one week of the item's arrival.

View all of Choshuya’s listings→View this item on the dealer’s site→

Previously sold — Gassan School

Samurai Museum
Tokuho
Tanto - Tokuho - by Gassan School - Modern Japanese Sword Tanto Signed by Sadakazu NBTHK Tokubetsu Hozon CertificateTanto - Tokuho - by Gassan School - Modern Japanese Sword Tanto Signed by Sadakazu NBTHK Tokubetsu Hozon Certificate
Sold

Tantō

ByGassan School
SOLD
Choshuya
Tanto - by Gassan School - Mei: Mikami Sadanao Saku, Heisei 3rd Year Mid-AutumnTanto - by Gassan School - Mei: Mikami Sadanao Saku, Heisei 3rd Year Mid-Autumn
Sold

Tantō

ByGassan School
SOLD
Giheiya
Katana - by Gassan School - Gendaito Katana: Kawai Minamoto Sadaharu with KoshiraeKatana - by Gassan School - Gendaito Katana: Kawai Minamoto Sadaharu with Koshirae
Sold

Katana

ByGassan School
SOLD
Choshuya
Tanto - by Gassan School - Ubu-nakago Mumei GassanTanto - by Gassan School - Ubu-nakago Mumei Gassan
Sold

Tantō

ByGassan School
SOLD
Choshuya
Katana - by Gassan School - Taia Gassan SadakazuKatana - by Gassan School - Taia Gassan Sadakazu
Sold

Katana

ByGassan School
SOLD
Choshuya
Tanto - by Gassan School - Japanese Sword for Sale | Ginza Choshuya | Ubu-nakago Mumei Gassan, 1481Tanto - by Gassan School - Japanese Sword for Sale | Ginza Choshuya | Ubu-nakago Mumei Gassan, 1481
Sold

Tantō

ByGassan School
SOLD
Aoi Art
Tokuho
Tanto - Tokuho - by Gassan School - Gassan Sadayoshi - Banzairaku InscriptionTanto - Tokuho - by Gassan School - Gassan Sadayoshi - Banzairaku Inscription
Sold

Tantō

ByGassan School
SOLD
Choshuya
Wakizashi - by Gassan School - Gassan Kaneyasu SakuWakizashi - by Gassan School - Gassan Kaneyasu Saku
Sold

Wakizashi

ByGassan School
SOLD

More from the Gassan school

View all →
Token-Net
Tokuho
Katana - Tokuho - by Gassan Sadakatsu - Gassan Seiren Saku (Osaka) made in November, Showa 10 (1935) - Commemorating the Birth of Imperial PrinceKatana - Tokuho - by Gassan Sadakatsu - Gassan Seiren Saku (Osaka) made in November, Showa 10 (1935) - Commemorating the Birth of Imperial Prince

Katana

ByGassan Sadakatsu
¥2,150,000
Aoi Art
Tokuho
Tanto - Tokuho - by Gassan Sadakatsu - Osaka ju Gassan Sadakatsu Kinsaku (kao) A lucky day in May, Showa 9 (1934). , accompanied by a maki-e lacquer box.Tanto - Tokuho - by Gassan Sadakatsu - Osaka ju Gassan Sadakatsu Kinsaku (kao) A lucky day in May, Showa 9 (1934). , accompanied by a maki-e lacquer box.

Tantō

ByGassan Sadakatsu
¥2,000,000
Toyuukai
Tokuho
Tanto - Tokuho - by Gassan School - Gassan - NBTHK Tokubetsu KichoTanto - Tokuho - by Gassan School - Gassan - NBTHK Tokubetsu Kicho

Tantō

ByGassan School
¥500,000
Touken Matsumoto
Tokuho
Katana - Tokuho - by Gassan Sadaharu - Kenryushi Fujiwara Sadaharu - Keio Gannen (1865)Katana - Tokuho - by Gassan Sadaharu - Kenryushi Fujiwara Sadaharu - Keio Gannen (1865)

Katana

ByGassan Sadaharu
¥1,000,000
Tsuruginoya
Katana - by Gassan Sadayoshi - Enomoto Sadayoshi, Showa 53rd YearKatana - by Gassan Sadayoshi - Enomoto Sadayoshi, Showa 53rd Year

Katana

ByGassan Sadayoshi
¥850,000
Toyuukai
Hozon
Tanto - Hozon - by Gassan Sadayoshi - Fuyou Asahi, Ansei Hebidoshi 8gatsuhi (Attributed to Gassan Sadayoshi) [NBTHK Hozon]Tanto - Hozon - by Gassan Sadayoshi - Fuyou Asahi, Ansei Hebidoshi 8gatsuhi (Attributed to Gassan Sadayoshi) [NBTHK Hozon]

Tantō

ByGassan Sadayoshi
¥400,000
Touken Matsumoto
Tokuho
Katana - Tokuho - by Gassan Naonobu - Yonezawa NaonobuKatana - Tokuho - by Gassan Naonobu - Yonezawa Naonobu

Katana

ByGassan Naonobu
¥550,000
Hyozaemon
Hozon
Tanto - Hozon - by Gassan School - Gassan Masanori - Beautiful Ayasugi HadaTanto - Hozon - by Gassan School - Gassan Masanori - Beautiful Ayasugi Hada

Tantō

ByGassan School
¥880,000

Swords

  • Katana
  • Wakizashi
  • Tantō
  • Tachi
  • Naginata
  • Yari

Fittings

  • Tsuba
  • Fuchi-Kashira
  • Kozuka
  • Menuki

By Certification

  • Tokujū
  • Jūyō
  • Tokuho
  • Hozon

Resources

  • Dealer Directory
  • Artist Directory
  • Glossary
  • Browse All
Nihontowatch© 2026
TermsPrivacyCookiesAbout
NihontoWatch Mon

NihontoWatchBETA

MarketAuctions
Encyclopedia
NihontoWatch Mon

NihontoWatchBETA

MarketAuctions
Encyclopedia