Previous answer is
Izumi Kami Fujiwara Kunisada (Inoue Shinkai Daimei)
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.
By the way, this sword was made by his son Inoue Shinkai which is called Daisaku(Made the sword for his father because his old age)
According to the Sayagaki by Mr. Tanobe seisei, the blade is Inoue shinkai daisaku.
Appraisal Quiz #456 (September 16th, 2017)
Who made this sword do you think ?
Hints. ※The picture will be enlarged
Blade length : 74.5 cm or 29.3 inches.
Sori :1.2cm or 0.47 inches.
Mekugi : 3
Width at the hamachi : 2.9cm or 1.14 inches.
Width at the Kissaki :2.04 cm or 0.83 inches.
Kasane :0.73 cm or 0.29 inches.
Shape : The blade is oosuriage mumei long size wide
and thick with longer kisaaki nice looking shape.
Jigane :Koitame hada well grained with jinie attach and chikei work.
Hamon :Suguha based komidare, Kogunome midare bright nie
and Habuchi is hotsure and fat Kinsuji uchinoke double hamon bright and clear.
Boshi is suguha style yakizume and hakikake hamon.
Answer will be posted at next Appraisal Quiz.
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