AS24699 Katana：Mumei (attributed to Omi Kami Tsuguhira) (NBTHK Hozon Token)

Ordering number:AS24699

Katana in Shirasaya (NBTHK Hozon Token)

Signature: Mumei (attributed to Omi Kami Tsuguhira)
:無銘(近江守継平)

Shinto: Wazamono: Jyo Saku / Musashi
We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku.
This blade is ranked as Jyo Saku among works attributed to Mumei (Omi no Kami Tsuguhira).
Habaki: Double-layered gold-covered
Blade Length: 67.3 cm (26.50 in)
Curvature: 1.23 cm (0.48 in)
Mekugi Hole: 3
Width at Base (Motohaba): 3.99 cm (1.57 in)
Width at Tip (Sakihaba): 1.99 cm (0.78 in)
Thickness of rim (Kasane): 0.62 cm (0.24 in)
Era: Jokyo era (1684) / Early Edo period
Shape: The blade has a wide mihaba with a slightly shallow sori and is of standard form. It features a bo-hi groove, creating a well-balanced appearance.
Jigane: Ko-itame hada, well-forged with a clear and refined texture.
Hamon: Suguha style with small ashi and a faint utsuri.

Features: This sword has been attributed to Omi no Kami Tsuguhira. His real name was Fujita Kohei from Echizen. He was a student of the third-generation Yasutsugu of Echizen and prospered alongside the third-generation Yasutsugu of Edo.

Aoi Art’s Comment: Historical Background – The Jokyo era marks the adoption of the first Japanese-made calendar. In 1685 (Jokyo 2), Shibukawa Harumi completed the “Yamato Calendar,” which was later renamed. He studied the Chinese Yuan Dynasty’s calendar system and cross-checked it with astronomical observations throughout Japan, compiling a calendar suited to Japan’s longitude and latitude. This innovation corrected the inaccuracies of the previously used Senmyo calendar and marked a revolutionary advancement in Japanese astronomical science.

NBTHK Hozon Token
Aoi Art estimation paper
Whole Oshigata
*Please note: The price does not include shipping fees.