Previous answer is
　 Bizen Suke Fujiwara Munetsugu.
Keio 4 Nen 5 Gatsuhi (May 1865)

Special feature:First generation Bizen no suke Munetsugu (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 at 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 #650 (July 24th, 2021)
Who made this sword do you think ?
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Blade length : 30.6 cm or 12.04 inches.
Sori : 0.4 cm or 0.15 inches.
Mekugi : 2
Width at the hamachi : 2.775 cm or 1.09 inches.
Kasane : 0.6 cm or 0.23 inches.
Shape : Wide and rather thick blade with Saki Zori.
Jitetsu : Itame Hada well grained with Jinie attach. The Jigane is beautiful.
Hamon : Nie Deki, square Gunome Midare. The Hamon is of uniform on both side.
In Ha, there are many Sunagashi and Tobiyaki.
Kissaki is round shape.

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