Previous answer is
Bishu Osafune Toshimitsu (Late Nanbokucyo period)
Special feature: Bishu Osafune Toshimitsu is Osafune school sword maker and made rather different style Hamon and jigane.
==============================================
Appraisal Quiz #538 (May 11th, 2019)
Who made this sword do you think ?
==============================================
Hints. ※The picture will be enlarged
Blade length : 71.1 cm or 27.99 inches.
Sori : 2.0 cm or 0.78 inches.
Mekugi : 2
Width at the hamachi : 2.99cm or 1.17 inches.
Width at the Kissaki : 2.01 cm or 0.79 inches.
Kasane : 0.66 cm or 0.25 inches.
Shape: A shinogi-zukuri katana, chu-kissaki, iori-mune.
Jitetsu: Mokume is combined with close itame-hada. Shirake-utsuri appears on the surface.
Hamon : Nie-deki. Ko-ashi and nezumi-ashi appear on the suguha-hamon.
================================================
Answer will be posted at next Appraisal Quiz.
================================================
(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)