Previous answer is
Hosho
保昌
Special feature : Hosyo school is Sadamune, who lived in Takaichi County, Yamato Province. Sadayoshi, who is known for having the skill of Sadayoshi, Sadakiyo, and Sadaoki, has Bunpo and Kareki.
The age of Gentei and others can be seen, and the activity and age of the group are clear. Their work shows Jigane’s total straight grain training.
The stem is covered with a higaki file, showing outstanding individuality among the five Yamato schools.
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Appraisal Quiz #742 (May 13th, 2023)
Who made this sword do you think ?
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Blade length:56.21cm or 22.12inches.
Sori:1.212cm or 0.47inches.
Mekugi:2
Width at the hamachi:3.21cm or 1.26inches.
Width at the Kissaki:2.27cm or 0.89inches.
Kasane:0.72cm or 0.28inches.
The weight of the sword:630grams
Shape: Approx. 3cm Machiokuri and Suriage. The whole signature is visible, fortunately. The blade is broad and thick with deep Sori and longer Kissaki.
Jigane: Koitamehada is grained well with Jinie to be beautiful Osaka Jigane.
Hamon: Niedeki Gunomemidare with lots of Ashi. Boshi is Midarekomi. Sunagashi and long Kinsuji work in Ha.
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