A Masterpiece of Japanese Swordcraft High level Sword made by Master swordsmith Gassan Sadatoshi 1971.


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Gassan Sadatoshi Katana (1971)

Immerse yourself in the exquisite craftsmanship of the renowned swordsmith Gassan Sadatoshi with this exceptional katana, forged in 1971. This sword, a testament to the legacy of Japanese sword making, is certified by the Japan Sword Culture Promotion Association and bears the Authentic Japanese Sword Certificate [NBSK].


  • Smith: Gassan Sadatoshi
  • Date: 1971
  • Certificate: Japan Sword Culture Promotion Association New Japan Sword Certificate [NBSK]

Inscription and Dimensions

  • Inscription: (Golden inlay) Sadamune kore wo utsusu Gassan Sadatoshi
    • “Sadamune Tsukiyama Sadatoshi Imitation Sculpture of Showa 226 Years Xinhai Year 1 Month Auspicious Day”
  • Signature: Sadamune kore wo utsusu Gassan Sadatoshi A.D.1971
  • Type: Katana and Shirasaya
  • Dimensions:
    • Length: 2 shaku 4 inches 8 minutes (75.2 cm)
    • Chain: 2.4 cm
    • Original Width: 3.4 cm
    • Point Width: 2.4 cm
    • Weight Blade : 888 gram.  

Background of the Swordsmith

Sadatoshi Tsukiyama, born in Showa 21, was the third son of Teiichi Tsukiyama, a revered second-generation human national treasure in the realm of Japanese sword making. Recognized by the Cultural Affairs Agency in Showa 44, Sadatoshi received numerous prestigious awards, including the Takamatsunomiya Prize, the Agency for Cultural Affairs Commissioner’s Award, and the Kanyama Prize. By the age of 36, he was certified as an Unexamined New Masterpiece Sword Exhibition. As the fifth generation of the Tsukiyama family, Sadatoshi inherited the Ayasugi forging and Tsukiyama carving techniques, producing powerful works that honored every tradition. He was known for his innovative forging and sword carving, expanding his influence both in Japan and internationally. His works, including sacred swords for temples and shrines, are part of collections in renowned institutions such as the Museum of Fine Arts, Boston, and the Metropolitan Museum of Art in New York.


This particular katana, forged by Sadatoshi Tsukiyama in Showa 46, emphasizes Aishuden, evident from the gold-inlaid inscription “Sadamune.” The sword features a wide, layered, long, and warped body with well-mixed ground iron and small plate grain. The blade text and the rough boil of the blade intermingle in places, showcasing the meticulous attention to detail. The intricate carving on the blade is sharp and carefully executed, fully displaying the charm and skill of Sadatoshi’s craftsmanship. This katana is not only a formidable weapon but also a piece of art that embodies the rich heritage and refined techniques of Japanese sword making. Own a piece of history and artistry with this magnificent Gassan Sadatoshi katana, a symbol of Japan’s illustrious sword crafting tradition

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