This piece is an unsigned Japanese sword of very high quality, with a blade that has a deep curve like a tachi.

The blade is well polished overall, but has the slightly coarse kitahada characteristic of works from the Koto period. The jigane is a mixture of mokume and itame, and the monouchi area in particular has active chikei. Yubashiri and other hataki are also clearly visible. The hamon is a fine, narrow sugu-ha with a nice scent, giving it a sharp appearance while also exuding a sense of elegance. Although the nakago is unsigned, the Society for the Preservation of Japanese Art Swords has certified this blade as the work of Naminohira, a swordsmith from Satsuma Province who was active in the mid-Muromachi period, and has designated it as a particularly valuable piece, issuing a special certificate of authenticity in October 1977.

Naminohira was a group of swordsmiths active in the Naminohira region of Satsuma Province, whose founder was Masakuni, a swordsmith who moved from Yamato Province in the mid-Heian period. His son took the name Yukiyasu, and the family became a renowned lineage that continued until the end of the Edo period.

The fittings are a mix of old and new, with the tsuba being an antique piece, while the fuchikashira and menuki are likely modern. The tsuka has been recently rewound, making it immediately usable for iaido or draw sword techniques.

This tachi, accompanied by the Tokubetsu Kicho appraisal certificate, is a very elegant and dignified piece. We highly recommend adding it to your collection.

• Blade length: 71.3 cm
• Curvature: 2.7 cm
• Number of Mekugi hole: 1
• Sakihaba: 18.7 mm
• Sakikasane: 4.5 mm
• Motohaba: 27.9 mm
• Motokasane: 6.9 mm
• Signature: No signature
• Era: Koto
• Structure: Shinogi-zukuri, Iori-mune
• Jigane: Itame with Mokume mixed in
• Hamon: Hoso-suguha
• Boshi: Massugu Haitte Omaru ni Kaeru
• Weight: 740 g(blade only)/970 g(without Saya)
• Nakago: Suriage
  
• Koshirae: Light yellow silk wrapped Tsuka with Kuro-ro lacquered Saya
• Original Registration No.: Akita 5661

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