Previous answer is
Bishu Osafune Kanemitsu /Jyowa 5nen ? Tsuki Hi (May 1349)

Special feature : Bishu Osafune Kanemitsu　is legitimate son of the great Kagemitsu and called Magozaemon.
At first he learned from his father and made sword like Kagemitsu style kataochi gunome and also Bizen style jigane
but he studied Sosyu den style.
He mixed up Bizen den and Sosyu den which is called Soden bizen style by his own idea.
The jigane is different from Bizen school item had and mokume had mixed
with jinie attach thickly and chikei appear and also clear Utsuri appear and visible to see the texture well.
Hamon also different from Bizen school which is mixed with sosyu jigane and bizen jigane.
The hamon is rather deep nioikuchi and sunagashi and also kinsuji work. Boshi is Togari ba.
This blade is the quality wonderful jigane and also clear Utsuri appear.
Kanemitsu is one of the 14 the best cut well swords for instance, Namioyogi Kanemitsu
and Ho kiri kanemitsu are quite well known swords.
Until now 13 Kanemitsu swords are designated as important cultural assets.
It is a few swords with signature and uramei swords.
I think The Kanemitsu reigns over the highest rank among Koto sword ranking.
It is quite few chance to obtain this kind of sword.

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Appraisal Quiz #353 (August 29st, 2015)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length : 51.8 cm or 20.39 inches.
Sori : 1.2 cm or 0.47 inches.
Mekugi : 2
Width at the hamachi : 2.69 cm or 1.05 inches.
Width at the Kissaki : 2.0 cm or 0.78 inches.
Kasane : 0.61 cm or 0.24 inches.
Shape : Osuriage Mumei, long wakizashi. Nice width and thickness.
Jitetsu : Itame Hada and Mokume Hada mix with Jinie attach.
There are Masa Nagare, fine Chikei and Utsuri.
Hamon : Ko-Nie Deki, Choji Midare with Kawazuko Choji mix.
This is beautiful Hamon. It looks like Ichimonji.

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