Previous answer is
　　Mumei(Kanenobu) (Naoe shizu school)

Special feature: Kanenobu has 2 types　of the blades.
Shuga Seki school and Naoe Shizu school.
This sword belongs to Naoe Shizu school,
which was made around late Nanbokucho period to early Muromachi period.
Kanenobu was a son of the Shizu Saburo Kaneuji and worked at Naoe.
The sword style is rather long kissaki and well grained nice Jigane
and Hamon. Especially Jigane consist of the Itame
and mokume hada with strong Chikei.
We recommend this nice Naoe shizu Kanenobu.

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Appraisal Quiz #629 (27th Feburary 2020)
Who made this sword do you think ?
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Blade length : 38.0 cm or 14.96 inches.
Sori :0.6 cm or 0.236 inches.
Mekugi : 2
Width at the hamachi : 2.71 cm or 1.07inches.
Width at the Kissaki : cm or inches.
Kasane : 0.51 cm or 0.2inches.
The weight of the sword 215 grams.
Shape : Hiruchi style sunnobi tanto wide and thick with small sakizori style.
On both sides of the blade has Bo-hi and soe-hi are engraved.
Jigane :Koitame hada and mokume hada well grained with jinie attach and chikei work.
The Jigane is extreme.
Hamon :Nie deki gunome midare and choji midare mixed with Kinsuji work.

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