Previous answer is
　 Mumei Tametsugu
無銘（伝為継）

Special Feature:He was called as a pupil of Norishige, or the son of Gono
Yoshihiro(Tametsugu), apparently this work resembles the
characteristics of Norishige, like Jigane or Hamon, in my opinion he
should be a pupil of Norishige.

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Appraisal Quiz #667 (November 20th, 2021)
Who made this sword do you think ?
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Blade length: 31.7cm or 12.48inches.
Sori: 0.6cm or 0.23inches.
Mekugi:1
Width at the hamachi: 2.74 cm or 1.07inches.
Kasane : 0.6 cm or 0.23inches.
The weight of the sword:290grams.
Shape: This is made from long sword and Suriage. It used to be a Nagamaki.
Jigane:Itame-hada flows, Jinie attached, Chikei works, looks blackish and gets Hadadachi.
Hamon:Koniedeki, Choji-midare mixed with Ko-Gunome-midare and Ha works very well at Koashi. Boshi is elaborate Midarekomi.

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