Previous answer is
　Mumei(judged as Norishige)
無銘(則重）　

Special feature: Kamakura Goro Said to be Nyudo Masamune's disciple and Yoshihiro's parent.　(Kokon Meizukushi) and other Edo period books list Norishige as one of the 10 Masamune Tetsu. It seems appropriate to accept the theory that go Kunimitsu is a disciple. Masamune should be seen as Aideshi, Norishige's style is Sosyu Jyoko, (high ranking Sosyu swordsmiths) most like Masamune, but he expresses changes in boil more than Masamune. It is characterized by the fact that there are many things that have been made, and the texture that is unique to the company, which is called Matsukawa Hada, has a larger pattern.

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Appraisal Quiz #728 (February 4th, 2023)
Who made this sword do you think ?
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Blade length:81.1cm or 31.92inches.
Sori:3.6 cm or 1.41inches.
Mekugi:1
Width at the hamachi:3.54cm or 1.39inches.
Width at the Kissaki:2.44 cm or 0.96inches.
Kasane:0.85cm or 0.33inches.
The weight of the sword:1150grams
Shape: The blade is broad and thick with deep Sori and Bohi on the both sides.
Jigane: Koitamehada is grained well with Mokumehada. Utsuri appears on the surface.
Hamon: Koniedeki Suguha with Koashi. Ashi and Yo work actively.

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