Previous answer is
MUMEI (AOE)

Special feature:The Aoe School had been prospered at the lower reaches of the Takanashi river in Bichu province.From middle Kamakura to Nanbokucyo perod is called Aoe school and more older sword which was made middle Kamakura to Hean period is called Koaoe school.
This sword belonged to Nanbokucyo period Aoe school.
This sword has typical special feature of Aoe school Chirimen hada with utsuri and notare round shape missaki.

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Appraisal Quiz #521 (January 12th, 2019)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length : 64.1 cm or 25.236inches.
Sori 1.06:cm or 0.42 inches.
Mekugi : 3
Width at the hamachi : 2.83cm or 1.114 inches.
Width at the Kissaki : 2.14 cm or 0.84 inches.
Kasane : 0.66cm or 0.26 inches.
Shape : The blade is oo suriage mumie.(cut shortened)
Jigane :Koitame hada and mokume hada mixed with uturi appear.
Beautiful fantastic texture.
Hamon :Konie deki suguha with ashi and sakasa ashi work.
Boshi: Midarekomi style.

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