Previous answer is
　 　Mumei(unsigned attributed as Sa Hiroyasu)　

Special feature: Sa is called Saemon Saburo who was a one student of Masamune 10 student member. The subject is bright and clear nice Jigane.

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Appraisal Quiz #585 ( April 18th, 2020)
Who made this sword do you think ?
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Blade length :　68.1　cm or 26.81 inches.
Sori : 1.3 cm or 0.51 inches.
Mekugi : 　2
Width at the hamachi : 2.73 cm or 1.07 inches.
Width at the Kissaki : 2.06 cm or 0.81 inches.
Kasane : 0.66 cm or 0.25 inches.
Shape : Regular width and thickness Katana with small Sori.
Jigane : Ko Itame Hada well grained with Jinie attach. There are clear Utsuri.
Hamon : Nioi Deki, Choji Midare with Togari-Ba and Fukuro Choji.
Boshi is Notare and round shape.

Hints. ※The picture will be enlarged

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Answer will be posted at next Appraisal Quiz.

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