Previous answer is
　 To-o Aizu shin Miyoshi Nagamichi (8 generation)
東奥合津臣三善長道

Special feature: Nagamichi 8th generation are sword smiths group worked
end of Edo period, Aizu Kanesada is one of the famous
sword smith.

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Appraisal Quiz #666 (November 13th, 2021)
Who made this sword do you think ?
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Blade length : 22.6 cm or 8.89inches.
Sori :0.1 cm or 0.03inches.
Mekugi : 2
Width at the hamachi :2.4 cm or 0.94inches.
Kasane : 0.4 cm or 0.15inches.
The weight of the sword:115 grams.
Shape : The blade is normally broad and thick: Mitsu Mune, has few Sori
and Bohi on the both sides: well-shaped Tanto.
Jigane :Itame-hada well grained, Jinie attached, Chikei works.
Hamon :Niedeki Gunome-midare, Nioikuchi is soft, Ashi and Ha work softly,
Sunagashi and Kinsuji work actively in hachuda. Especially from the middle of the blade to the tip
has a rough and stormy Hamon and Sunagashi and Kinsuji work much harsher: a masterpiece.

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