This is a historical mumei (unsigned) katana attributed to the renowned Uda school. It has been officially designated as a Hozon Tōken (保存刀剣) by the NBTHK, certifying its cultural value and authenticity. The sword features a beautiful silhouette, pronounced curvature, and refined craftsmanship suitable for both appreciation and practice.

Attribution

• Signature: Mumei (Unsigned)
• School: Attributed to Uda,active during the Nanbokuchō and Muromachi periods

Blade Specifications

• Blade Length : 64.7 cm
• Hamon : Suguha
• Curvature : 2.1 cm
• Mekugi-ana (Peg Holes): 3
• Motohaba (Base Width): Approx. 29.7 mm
• Motokasane (Base Thickness): Approx. 6.5 mm
• Sakihaba (Tip Width): Approx. 19.7 mm
• Sakikasane (Tip Thickness): Approx. 4.2 mm
• Weight (Bare Blade): 625 g

Hozon Token Status

This blade has been recognized by the NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai) as a Hozon Tōken, meaning "Sword Worthy of Preservation." This designation confirms the sword's authenticity, quality, and historical importance. Swords with this certificate are legally protected and respected in the Japanese sword collecting community.

Notes

Blades attributed to the Uda school are known for their excellent forging quality, straight grain jihada, and practical cutting geometry. The large curvature gives this blade an elegant and commanding presence, and the presence of three mekugi-ana suggests it has seen use across multiple mountings, reflecting its active history.