Previous answer is
　 Yamato Kami Yasusada
大和守安定

Special feature : amato (No) Kami Yasusada was a pupil of the First generation Yasutsugu of Echizen province. The First Shogun Tokugawa Ieyasu permitted Yasutsugu the First using hollyhock crest and the character Yasu. Yasusada mainly forged sword at Edo and their collaboration survives.
This katana shows traditional kambun-shinto style.
Yasusada's sword has good reputation for sharpness.
According to the Fujishiro book even though Yamada asaemon wrote Yasusada as Ryo wazamono cutting test ranking, judged as the top ranking cut well sword.
This sword is typical Edo Hojyoji or Kotetsu Jigane which is koitame hada well grained jigane.
Also Hamon is very similar with Kotetsu Jyuzu ba hamon with thick nioikuchi and deeo Habuchi bright hamon.
Yasurime is very clear which has been kept in good condition for a long period precious sword.

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Appraisal Quiz #673 (January 7th, 2022)
Who made this sword do you think ?
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Blade length : 76.0 cm or 29.9 inches.
Sori : 1.5 cm or 0.59 inches.
Mekugi : 2
Width at the hamachi : 3.22 cm or 1.26 inches.
Width at the Kissaki : 2.26 cm or 0.88 inches.
Kasane : 0.73cm or 0.28 inches.
The weight of the sword 850 grams.
Era : Nanbokucho period.
Shape : O-Suriage Mumei sword. Wide and thick, Sori is regular and Kissaki is longer.
Bo-hi is engraved on bothside.
Jigane : Itame-Hada well grained, Jinie attached, pare Utsuri is engraved.
Hamon : Ko-Niedeki Suguha. Sunagashi and Kinsuji worked.
Boshi: Midare-Komi sharp round shape.

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