説明
Sword Specifications Maker: Uda Hirakuni Mumei Period: Late Muromachi Certificate: NBTHK Hozon Blade Length: 62.0 cm Curvature: 1.5 cm Width at Base: 2.83 cm Width at Tip: 1.82 cm Thickness at Base: 7.2 mm Thickness at Tip: 5.0 mm Blade Weight: 523 g Mekugi-ana (Peg Holes): 3 This is an authentic Koto-era (古刀) katana attributed to the Uda School , a renowned sword-making tradition known for producing finely crafted, resilient blades. The sword has been officially designated as a Hozon Token (Preservation Sword) by the NBTHK certifying its historical and artistic value. The blade features a bohi , reducing weight while maintaining structural integrity. Expertly polished, the sword retains its cutting ability , making it suitable for iaido, battōjutsu, and tameshigiri . The craftsmanship of this katana reflects the distinct characteristics of Uda School swords, which originated in the Nanbokuchō to Muromachi periods (14th–16th centuries) . The blade exhibits a well-forged hada (steel grain structure) , with a balanced curvature ( 1.5 cm ) that enhances both aesthetics and functionality. Mountings & Special Features Shirasaya: Comes in a high-quality, newly crafted white scabbard for preservation. Bohi (Groove): Aesthetic and functional fullering, improving handling and reducing weight. Condition: Professionally polished, enhancing the visibility of the hamon and steel structure. About the Uda School The Uda School originated in Etchū Province (modern-day Toyama Prefecture) and was active from the late Kamakura to Muromachi periods. Uda smiths were known for their strong, practical swords, often featuring a refined itame-hada (wood-grain steel pattern) and an elegant suguha or midare hamon . Their blades were highly regarded by samurai for their durability and cutting performance.
