Previous answer is
Bizen Kuni Ju Osafune Yozaemon Jo Sukesada/Eiroku 10 Nen Nagatsu Kichijitsu.
Special feature: Bizen Kuni Osafune Yozaemon Jyo Sukesada is a student of Suemitsu.
The Bizen Kuni Osafune Yo so zaemon sukesada is very very close so I think These sword smiths are some relation ship between 2 sword makers.
==============================================
Appraisal Quiz #648 (July 10th, 2021)
Who made this sword do you think ?
==============================================
Blade length : 71.5cm or 28.1 inches.
Sori : 1.8cm or 0.70 inches.
Mekugi :
Width at the hamachi : 2.85cm or 1.12 inches.
Width at the Kissaki : 2.14cm or 0.84 inches.
Kasane : 0.65cm or 0.25 inches.
The weight of the sword 760 grams.
Shape : Suriage sword with regular width and thickness. Sori is deep and Kissaki is longer.
Jigane : Ko-Itame-Hada with thin Masame. Jinie attached, Chikei and Shirake Utsuri are visible.
Hamon : Niedeki Choji Midare continued. Ko-ashi and Yo worked.
The Choji Midare around Monouchi of back side. Boshi is Midare komi style. Hamon also appear on Shinogi and Mune.
================================================
Answer will be posted at next Appraisal Quiz.
================================================
(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)