Previous answer is
Mumei (Den Yoshikage)

Special feature : Yoshikage was a son of the Kagemitsu and a student of the Chikakage.
His subject was influenced a lot from his father Kagemitsu especially Kataochi gunome midare hamon. There are very few Zaimei swords(with signature) .
This blade is Oosuriage Mumei, Naginata Naoshi Katana.

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Appraisal Quiz #293 (May 30th, 2014)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length : 70.3 cm or 27.67 inches.
Sori : 1.4 cm or 0.55 inches.
Mekugi : 2
Width at the hamachi : 3.27　cm or 1.28 inches.
Width at the Kissaki : 2.25 cm or 0.88 inches.
Kasane : 0.73 cm or 0.28 inches.
Shape : The blade is wide and thick with longer kissaki nice shape.
Jitetsu :Koitame had well grained with jinie attach beautiful texture.
Hamon : Niedeki gunome midair with thick nioikuchi and ash work.
Boshi is midarekomi with Ashi.

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