Tanto - Yoshinori - Aikuchi Koshirae - Ubu Nakago - Koto Era - Hokkaido 15613

¥398,000 ¥430,000

A unique Kaiken(pocket sword), believed to have been made in the early Muromachi period, has just arrived.

The sword is in extremely good condition with zero defects such as flaws, rust, or chips. The jigane has itame mixed with mokume and hataraki such as yubashiri. Hamon is elegant suguha with tight nioikuchi, and the distinctive utsuri that is common in pieces from the Bizen region is also faintly visible.

The shape of Nakago is frisode, so called because of its resemblance to the sleeves of a kimono. Frisode nakago pieces are very rare in the market. The name Yoshinori is engraved on the nakago.

Yoshinori was a swordsmith from the Yoshii school, and he was active in Bizen in the early Muromachi period. The Yoshii was a school of swordsmithing that flourished in the Yoshii-area across the Yoshii River that flows through the Osafune region, and Yoshinori later moved to the Izumo region to mirror its activities.

The koshirae consists of a sharkskin-wrapped tsuka and a unique black lacquered scabbard with horizontal kizami.

The Society for Preservation of Japanese Art Swords granted kicho certification to this piece in June 1978 and issued a certificate of authenticity for it.

Despite its small size, this Kaiken has a very strong presence, and yet it has a frisode nakago, making it truly a highly valuable piece to be passed down to the future. Add this pocket sword by the prestigious Yoshii school to your collection now.

  • Blade length: 18.5 cm
  • Curvature: 0.0 cm
  • Number of Mekugi hole: 3
  • Motohaba: 17.9 mm
  • Motokasane: 5.9 mm
  • Signature: Yoshinori(front)
  • Era: Koto
  • Structure: Hira-zukuri, Iori-mune
  • Jigane: Itame with Mokume mixed in
  • Hamon: Suguha
  • Boshi: Togatte Kaeru
  • Weight: 100 g(blade only)/1720 g(without Saya)
  • Nakago: Ubu
  • Koshirae: Polished sharkskin wrapped Tsuka & black-lacquered Kizami style Saya
  • Original Registration No.: Hokkaido 15613

Please contact us if the katana you are looking for is not listed here.

Voices of Authentic Craftsmanship

The quality of the blade and the simplicity of the shirasaya mount truly reflect traditional Japanese mastery. A beautiful and meaningful addition to my collection.

James Holloway

The natural wood finish and clean design highlight the beauty of the blade perfectly. Exactly what I was looking for.

Daniel Fischer,

Rooted in Centuries of Craftsmanship

Every blade reflects generations of knowledge, discipline, and precision passed down through traditional Japanese swordmaking. From the forging of steel to the final finishing touches, each piece is shaped with patience, mastery, and deep respect for heritage.

Authenticity in Every Detail

From carefully selected materials to the refined finishing of every surface, each sword is crafted and presented with uncompromising attention to detail. Our commitment to authenticity ensures every piece reflects true tradition, lasting quality, and enduring cultural value.

Precision Shaped by Tradition

Designed with balance, simplicity, and purpose, our blades embody the harmony between refined form and skilled craftsmanship. Each sword represents a thoughtful union of strength, elegance, and the timeless discipline of Japanese artisans.

Forged in Tradition. Defined by Precision.

Forged in Tradition. Defined by Precision.

Discover authentic Japanese blades crafted with discipline, balance, and generations of timeless craftsmanship.