Previous answer is
　　 Izumi Kami Fujiwara Kunisada　

Special feature:This is a fine work of Izumi (No) Kami Kunisada the First.
He is known as the father of a famous swordsmith Inoue Shinkai.
Usually this Kunisada is called Oya-Kunisada.
Oya means parent in Japanese. Kunisada the First was born in 1590
in Hyuga province, present Miyazaki pref.
He became a pupil of Horikawa Kunihiro at Kyoto.
Kunisada went to Osaka and trained many excellent pupils.
It has been an accepted opinion that he was the founder of Osaka-Shinto.
Kunisada was approved as the Izumi (No) Kami in 1623.
He passed away in 1652.
Kunisada forged this one around Kan-ei era that was the most active
and substantial period in his life. Another piece forged
in the same period approved a Juyo-bijutsu-hin, an important art object.

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Appraisal Quiz #621 (December 26th 2020)
Who made this sword do you think ?
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Blade length : 69.0 cm or 27.16 inches.
Sori :1.9 cm or 0.74 inches.
Mekugi : 2
Width at the hamachi : 2.91 cm or 1.14 inches.
Width at the Kissaki : 2.04 cm or 0.80 inches.
Kasane : 0.63 cm or 0.24 inches.
The weight of the sword 650 grams.
Shape : Ouriage Katana with nice thickness, later deep Sori, and longer Kissaki.
Jigane : Ko Itame Hada and Ko Mokume Hada mixed with Jinie attach. There are Chikei.
Shinogi-Ji: Ko Itame Hada and Ko Mokume Hada mixed. You can see the Masame Hada.
Hamon : Nie Deki, Suguha Hamon base with thick Nioikuchi.
There are Ashi and Yo. The Habuchi is soft. In the Ha, there are Kinsuji.
Boshi is Ichimai and turned. In the Ha, there are Sunagashi.

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