c0072 Katana:Naminohira Yasuyuki(NBTHK Tokubetsu Hozon Token)

Katana in Shirasaya (NBTHK Tokubetsu Hozon Token)

Signature: Naminohira Yasuyuki　波平安行

We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku.
This blade is ranked as Jyojyo Saku for Naminohira Yasuyuki.

Habaki: Gold-plated single-layered
Blade Length: 60.3 cm (23.74 in)
Curvature: 0.7 cm (0.28 in)
Mekugi Hole: 1
Width at Base (Motohaba): 3.03 cm (1.19 in)
Width at Tip (Sakihaba): 2.2 cm (0.87 in)
Thickness of rim (Kasane): 0.75 cm (0.30 in)
Sword Weight: 670 g

Era: Edo period, around the Kanbun era (1661–1673)
Shape: wide and thick blade with small curveture and long kissaki.
Jigane: Densely forged and high-quality Jigane.
Hamon: thick Suguha and Notare with soft Ashi. Boshi is rounded with faint Kinsuji.

Features: Shinto: Wazamono: Jyo Saku: Satsuma
ChatGPT:
Namihira Yasuyuki was a student of the first-generation Masafusa, and this piece is a characteristically Satsuma-style sword with a wide body. The jigane is soft and finely forged, showing excellent quality.

Due to the meaning of the name “Namihira” (literally “calm waves”), it is said that their swords were especially favored by naval officers who wished for safe voyages.

NBTHK Tokubetsu Hozon Certificate(to be issued in September)
Aoi Art estimation paper: Whole Oshigata