Previous answer is
Signature: Namu Ami Dabutsu(Mumei judged as Tegai school)
Tegai is a school of Yamato-togi (forging technique) and is said to be a branch of the Nara school of Yamato-togi, with Bao Nagayasu considered its founder. In Yamato, there were several schools such as Osa, Shiriken, Hosho, Senshuin, and Tegai, among which the Tegai school produced many swords with straight temper patterns.
==============================================
Appraisal Quiz #753 (July 29th, 2023)
Who made this sword do you think ?
==============================================
Blade length:76.3cm or 30.03inches.
Sori:1.4cm or 0.55inches.
Mekugi:2
Width at the hamachi:3.26cm or 1.28inches.
Width at the Kissaki:2.33cm or 0.91inches.
Kasane:0.74cm or 0.29inches.
The weight of the sword:995grams
Shape: The blade is broad and thick with small Sori and longer Kissaki. Large Ububa is
left.
Jigane: Koitamehada is very dense to be beautiful.
Hamon: Niedeki, rounded Gunomemidare with partial sharp edge.
Boshi is long Midarekomi.
================================================
Answer will be posted at next Appraisal Quiz.
================================================
(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)