Newly Forged Japanese Katana by Gassan Sadanobu (月山貞伸) — Heir to the Gassan Ayasugi Tradition

Commission a blade from the grandson of Living National Treasure Gassan Sadakazu

Gassan Sadanobu is the leading smith of the new generation of the Gassan family, a line of swordsmiths that traces its tradition back some eight hundred years and is known above all for ayasugi-hada (綾杉肌), a rhythmic, wave-like forging pattern so closely tied to the family that it is also called "Gassan-hada." The grandson of Living National Treasure Gassan Sadakazu (月山貞一) and son of Gassan Sadatoshi (月山貞利), he has won the Kanzan Prize at the NBTHK Gendai Tōshoku-ten (Contemporary Sword Craftsmanship Exhibition) and two ministerial prizes at the New Sword, Polishing and Mountings Craftsmanship Exhibition. A katana commissioned through Tozando is forged to order by the smith himself and priced as set by the All Japan Swordsmith Association (全日本刀匠会).

On the smith — Gassan Sadanobu (月山貞伸)

Sadanobu was born Gassan Ichirō (月山一郎) in 1979 in Sakurai, Nara Prefecture, the eldest son of Gassan Sadatoshi. His father, the third son of Gassan Sadakazu, is a mukansa (exhibition-exempt) smith and a holder of Nara Prefecture Intangible Cultural Property. In 1998, on entering Kyoto Sangyo University, Sadanobu began his apprenticeship under his father at the family forge, starting, as every apprentice does, with the humblest tasks of the workshop.

He received his swordsmith's license from the Agency for Cultural Affairs in 2006. He works with his father at the Gassan Nihontō Tanren Dōjō (月山日本刀鍛錬道場), the Gassan family forge and memorial hall in Chihara, Sakurai. His blades are signed Yamato no Kuni jū Gassan Sadanobu (大和国住月山貞伸, "Gassan Sadanobu, resident of Yamato Province"), and he carves his own horimono (blade engravings) in the Gassan manner. Since 2022 he has served as an executive director for education of the All Japan Swordsmith Association.

Awards and recognition

Sadanobu made his debut in 2007 with the Newcomer's Prize at the NBTHK Shinsaku Tōten (New Sword Exhibition, now the Gendai Tōshoku-ten). At the NBTHK exhibition he went on to receive the Chairman's Prize in 2020 and the Kanzan Prize, one of the exhibition's special prizes, in the tachi and katana division in 2026.

At the New Sword, Polishing and Mountings Craftsmanship Exhibition (新作日本刀 研磨 外装 刀職技術展覧会) he has won silver and bronze prizes from 2010 onward, a special grand prize in 2015, gold prizes in 2018, 2020 and 2022, and in 2024 both the Minister of Economy, Trade and Industry Prize for first place in the swordmaking division and the Minister of Education, Culture, Sports, Science and Technology Prize. He has also received numerous prizes at the Omamori-gatana (protective sword) Exhibition, including the Minister of Education Prize in 2018.

Notable activities

Beyond the forge, Sadanobu has worked to bring the Japanese sword to new audiences, taking part in a 2012 exhibition pairing Japanese swords with the anime Evangelion, collaborating on G-SHOCK watch models in 2019 and 2022, and appearing on the television documentary series Crossroad in 2016.

Style — ayasugi-hada and Sōshū nie

The hallmark of Sadanobu's work is the family's ayasugi-hada, in which the grain of the steel flows across the whole blade in regular, wave-like undulations; it is a technique preserved by the Gassan smiths and rarely seen elsewhere. He works mainly in the Sōshū-den (Sagami tradition) and Bizen-den (Bizen tradition). His Sōshū-style blades show a bright nie-deki temper (formed of visible, glittering crystals), typically a gently undulating notare hamon with bright, even nie along the edge, set in a well-forged itame (wood-grain) jigane. His 2026 prize-winning tachi combined ayasugi and mokume grain with tobiyaki (detached islands of temper) around a large kissaki, showing his willingness to push the tradition forward.

A commissioned katana by Gassan Sadanobu brings the living Gassan tradition, and its unmistakable ayasugi steel, into the hands of a single owner. It is a blade made to be handed down as a family treasure. Please contact us to discuss specifications and lead time.

Smith profile

• Swordsmith name: Gassan Sadanobu (月山貞伸)
• Real name: Gassan Ichirō (月山一郎)
• Born: 1979, Sakurai, Nara Prefecture
• Teacher: his father, Gassan Sadatoshi (月山貞利), from 1998
• Swordsmith license: 2006 (Agency for Cultural Affairs)
• Forge: Gassan Nihontō Tanren Dōjō, Sakurai, Nara
• Major awards: NBTHK Kanzan Prize (2026); NBTHK Chairman's Prize (2020); Minister of Economy, Trade and Industry Prize and Minister of Education Prize (2024)
• Specialty: Gassan ayasugi-hada; Sōshū-den and Bizen-den; self-carved horimono
• Price: set by the All Japan Swordsmith Association (全日本刀匠会)