Previous answer is
　 Mumei (Den Shizu)
無銘(伝 志津)　

Special feature:Shizu is originally the name of the country of Mino, but it is
called Shizu Saburo Kaneuji after the place where
Masamune's master
Kaneuji came to live and made a sword. Therefore, the work
simply called Shizu means Kaneuji.
Since ancient times, he has been counted as one of the ten
swordsmiths of Masamune, and he is one of the
swordsmiths who has the style closest to Masamune
among them, but on the ground. The highlight of this work
is that there is a Masame hada and Gunome midare is
mixed to Hamon.

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Appraisal Quiz #659 (September 25th, 2021)
Who made this sword do you think ?
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Blade length : 68.1 cm or 26.8 inches.
Sori : 1.6 cm or inches.
Mekugi : 1
Width at the hamachi : 3.14 cm or 1.24 inches.
Width at the Kissaki : 2.19 cm or 0.86 inches.
Kasane : 0.67 cm or 0.26 inches.
The weight of the sword 765 grams.
Shape : The blade is wide and thick with suitable sori and long kissaki.
Jigane : Ko Itame hada well grained with jinie attach. It looks like muji style.
Hamon : Suguha from hamachi area, and then Nioideki chojimidare　with soft ashi.

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