Signature: Mumei(unsigned) attributed as Bisyu Osafune Sukesada.
Blade length : 68.0 cm or 26.77 inches.
Sori :1.8 cm or 0.7 inches.
Kasane :0.56 cm or 0.22 inches.
Width at the hamachi : 2.88cm or 1.13 inches.
Width at the Kissaki : 1.12 cm or 0.44inches.
Weight of only blade:665gram.
Era : Late Muromachi period.1570. Eiroku era.440 years ago.
Shape : The blade is regular sze width, kasane with deep sori nice looking shape.
Jitetsu :Itame had and mokume had mixed with jinie attach and sumihada appear.
Hamon : Niedeki suguha and gunome midair mixed.
Special feature : From Jigane and Hamon and also nakago shape,
the blade might be Bizen school.
There are some openings and rough jignae which has passed more than 440 years.
The sword is called mass productive item.