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.
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Appraisal Quiz #395 (July 9thkantei3, 2016)
Who made this sword do you think ?
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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.
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