Previous answer is
　 (Inoue) Izumi Kami Kunisada.
二代 井上 真改

Special feature:The second son of Izumi Kami Kanesada (the first
generation), he learned the sword making technique while helping his
father's parents under the name of Hachirobei, and after his father
became old, he was doing a ghostwriting for his father (daisaku). He
received the chrysanthemum crest by dedicating a making sword to
the imperial court around Manji 4th year. He first changed his name to
Izumo Kami Kunisada and Inoue Izumo Kami Kunisada and changed his
name to Inoue Shinkai in August of the 12th year of Kanbun. Tenna
died on November 9, 2nd year

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Appraisal Quiz #654 (August 21st, 2021)
Who made this sword do you think ?
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Blade length : 70.36 cm or 27.70 inches.
Sori :2.12 cm or 0.83 inches.
Mekugi : 3
Width at the hamachi : 2.78cm or 1.09 inches.
Width at the Kissaki : 1.96 cm or 0.77 inches.
Kasane : 0.68cm or 0.26 inches.
The weight of the sword 695grams.
Shape : O-Suriage, wide and thick Katana with Sori.
Jigane: Ko Mokume Hada well grained with Jinie attach.
The Jigane is beautiful. There are clear Midare Utsuri.
Hamon : Nie Deki, Suguha Hamon with small Ashi an Yo.
Boshi is round shape.

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