Previous answer is
Nobukuni
Special feature: Nobukuni was a sword smith of Yamashiro.
NBTHK Tokubetsu Hozon paper said that the blade was made around the end of Nanbokucho period to Ouei era.
At a glance, this blade looks Rai Kunimitsu.
The Jigane has Utsuri and elegant Hamon.
==============================================
Appraisal Quiz #543 (June 15th, 2019)
Who made this sword do you think ?
==============================================
Blade length : 38.7 cm or 15.23 inches.
Sori : 0.8 cm or 0.31 inches.
Mekugi : 1
Width at the hamachi : 3.26 cm or 1.28 inches.
Kasane : 0.62 cm or 0.24 inches.
Weight of the blade : 385 cm
Shape : Wide and thick long Hirauchi Wakizashi.
Jigane : Ko-Itame Hada well grained with Jinie attach.
visible to see the texture.
Hamon : Nie Deki, Gunome Midare, O-Gunome Midare.
There are soft Ashi. In Ha, there are Sunagashi and Kinsuji.
Hints. ※The picture will be enlarged
================================================
Answer will be posted at next Appraisal Quiz.
================================================
(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)