Previous answer is
Mumei (attributed to Omura Kaboku)
(Kiri-tsuke Mei): Ken Tanren Gokusei Den Tame Kaho
Fujii Noriaki Bunki Chichi Kore wo Haku
無銘(大村加ト)
(切付銘)乾鍛錬極精伝為家宝
藤井徳昭文熈父佩之

Features: This is a rare work by Omura Kaboku.
Also known as Omura Saemon-no-Jibu, he originally served as a surgeon under Matsudaira Mitsunaga of the Echigo Takada Domain, and later served Tokugawa Mitsukuni in Mito.
There is an anecdote that he was so impressed by the famed Dojigiri Yasutsuna, which was then in the Takada Domain, that he began forging swords himself.
Although Kaboku claimed to have forged over 100 swords, very few of his works remain.
Due to their popularity even in his time, many forgeries are said to exist.
This piece, while unsigned, has been attributed to Kaboku without doubt, making it historically very valuable.
Mr. Tanobe wrote the sayagaki attributing the sword to Omura Kaboku, and the Japanese Sword Museum reached the same conclusion.
It is a remarkable piece.

=====================================
Appraisal Quiz #879 (January 17th, 2026)
Who made this sword do you think ?
=====================================

Blade Length: 70.8 cm (27.87 in)
Curvature: 2.4 cm (0.94 in)
Mekugi Hole: 2
Width at Base (Motohaba): 3.4 cm (1.34 in)
Width at Tip (Sakihaba): 2.18 cm (0.86 in)
Thickness of rim (Kasane): 0.72 cm (0.28 in)
Sword Weight: 720 g
Shape: The blade is wide with a rounded mune. The kissaki is slightly long.
Jigane: The hada is clearly visible with strong activity in the jihada. The blade exhibits sunagashi and kinsuji in the ha.
Hamon: The boshi turns down and rises roundly, with kinsuji included and a sweeping hakikake boshi.

=====================================

Answer will be posted at next Appraisal Quiz.

=====================================

(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)