Previous answer is
Mumei (Den Yoshikage)
Special feature : According to the Jyuyo Zufu, Yoshikage was reported as Kanemitsu or Cyogi school but recently he was a student of Chikakage by the recent study.
This sword is Itame and Mokume convined with nice clear Utsuri and also a lot of activities of the Kinsuji and Sunagashi.
Yoshikage made a lot of Nagamaki which Hamon is also Chiji and Ko-Choji Midare.
This blade is designated a 31th NBTHK Juyo sword.
There are many activity in Ha.
Appraisal Quiz #395 (July 9thkantei3, 2016)
Who made this sword do you think ?
Hints. ※The picture will be enlarged
Blade length : 67.0 cm or 26.37 inches.
Sori : 2.1 cm or 0.82 inches.
Mekugi : 3
Width at the hamachi : 2.665 cm or 1.04 inches.
Width at the Kissaki : 2.0 cm or 0.78 inches.
Kasane : 0.59 cm or 0.23 inches.
Shape : Regular size, Osuriage Mumei Katana with large Sori.
The Kissaki is long. The nice shape Katana.
Jitetsu : Ko-Itame Hada well grained with Jinie attach.
There are Chikei. The Jigane is clear.
The Shinogiji is also Itame Hada, Mokume Hada and Masanagare.
Hamon : Ko-Nie Deki, Choji Midare. In Ha, there are Ashi, Yo and Sunagashi and Kinsuji.
Boshi is round shape.
Answer will be posted at next Appraisal Quiz.
(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)