Previous answer is
Koyama Munetsugu/Tenpo 10 Nen 3 Gatsu Hi(March 1839)

Special feature : Koyama Munetugu was born at Mutsu Shirakawa province
as a son of Koyama Munehira. His name was Soubei.
He was working for Matudaira Daimyo family as a sword making Samurai.
He moved to Kuwana province with his master and then he moved to
Edo Tenpo 2 nd year.At that time he was high reputation of cut well
swords maker. some times we found his swords which was done
Saidanmei and also possession name on the tang of the blade.
Generally speaking the quality of Munetsugu is one of the top sword
smith in late Edo period and without any faults among his swords

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Appraisal Quiz #496 (July 21st, 2018)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length :　61.6　cm or 24.25 inches.
Sori : 1.6 cm or 0.62 inches.
Mekugi : 　2
Width at the hamachi : 2.96 cm or 1.16 inches.
Width at the Kissaki : 2.0 cm or 0.78 inches.
Kasane : 0.65 cm or 0.25 inches.
Shape : Short Katana, regular width and thickness with large Sori.
Jigane : Ko-Itame Hada well grained with Jinie attach.
The Jigane is beautiful.
Hamon : Nie Deki, Choji Midare. The Hamon of Boshi is Midarekomu.

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