Previous answer is
Mumei(unsigned) attributed as Tametsugu
Special feature:t is an accepted opinion that Tametsugu was a son of Go (No) Yoshihiro and learned under Norishige though there is still room for more research about the difference of chrono-range among them. Both Yoshihiro and Norishige were counted among ten brilliant pupils of Masamune. Norishige created a peculiar texture of jitetsu compounded soft and hard iron commonly called matsukawa-hada or Norishige-hada in Japanese.
Tametsugu’s works in Echizen province dated in 1357 and 1369 are still remain
on the record as oshigata pictures. An extant inscrived Noshu Ju Fujiwara Tametsugu
in 1374 shows he moved to Mino province from 1369 to 1374 .
Judging from the texture of jitetsu, this katana should be attributed to Hokkoku-mono,
forged in the northern province of Japan. Deep-nioikuchi, thick nie,
many sunagashi and kiusuji form an attractive temperline of Tametsugu.
Both jitetsu and hamon create a healthy impression.
Appraisal Quiz #572 (January 18th, 2020)
Who made this sword do you think ?
Blade length : 69.24 cm or 27.25 inches.
Sori : 1.36 cm or 0.53 inches.
Mekugi : 1
Width at the hamachi : 3.28 cm or 1.29 inches.
Width at the Kissaki : 2.66 cm or 1.04 inches.
Kasane : 0.6 cm or 0.23 inches.
The weight of the sword 830 grams.
Shape : The blade is wide and thick with long kissaki. It is like nagamaki.
Jigane : Koitame hada well grained with jinie attach.
Hamon : Koniedeki chooji midare with ashi and yo. There are fine sunagashi and kinsuji in the blade.
Bo-shi is pointed shape with gunome midare and choji midare. There are also kinsuji in bo-shi.
Hints. ※The picture will be enlarged
Answer will be posted at next Appraisal Quiz.