Previous answer is
Bizenkoku Ju Osafune Magoue jyo Kiyumitu Saku.
Eiroku 13 Nen 8 Gatsu Kichijitsu.
Special feature : Magouemon Kiyumitu is a son of the Gorozaemon Kiyomitsu and well known high repotted wordsmith as same as Gorozaemon Kiyomitu his father.
At that period, Japan was Sengokujidai(battling each others) and needs a lot of Japanese swords for demanding consumers.
All most all swords are mede by mass productive swords like Bisyu Osafune Sukesada.
But some swords were made for Daimyo or high ranking samurai which is called Zokumyo sukesada or Kiyomitsu.
Zokumyo means that the signature is curving on the nakago like Magouemon and Gorozaemon not others.
This sword is typical Zokumyo Kiyomitsu.
The sword is extraordinary different from Kazuuchimono.
The blade is healthy and good work in Ha and also fine jigane and healthy blade.
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Appraisal Quiz #235 (March 15, 2013)
Who made this sword do you think ?
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hints. ※The picture will be enlarged
Wakizashi
Blade length : 33.63 cm or 13.24 inches.
Sori : 0.3 cm or 0.11 inches.
Mekugi : 2
Width at the hamachi : 1.90cm or 0.74 inches.
Kasane : 0.50 cm or 0.19 inches.
Era : Early Edo period.
Shape : The blade is a little longer Sunnobi tanto.
Jitetsu : Itame had and mokume had mixed with jinie attach nice blackish jigane.
Hamon : From Hamachi area, suguha and then notare gunome midair mixed nd same hamon on the front and back.
Boshi : Round shape yakisage long.
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