Ordering number :08359
Katana in Shirasaya(NBTHK Hozon Paper)
Signature: Hirosada
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku
Jyo saku and regular saku)
This blade belongs to Jyo Saku ranking.
The blade was polished .
Blade length : 72.0 cm or 28.34 inches.
Sori : 1.5 cm or 0.59 inches.
Mekugi: 2
Width at the hamachi : 3.08 cm or 1.21 inches.
Wide at the Kissaki : 1.87 cm or 0.73 inches.
Kasane : 0.62 cm or 0.24 inches.
The weight of the blade is 615 grams.
Era : late Muromachi period.
Shape : The blade is regular sized sword.
Jitetsu :Koitame hada well grained with much jinie attach.
On the fantastic nice jigane, clear Utsuri appear .jigane.
Hamon : koniedeki Suguha hamon with komidare.
Special feature : The signature is mentioned on the Omote side.
There are several sword maker mentioned Hirosada.
It is difficult to say which Hirosada but I think the Jigane and Hamon, the blade looks like Aoe school.
NBTHK Hozon paper states that the work is from the late Muromachi period.
NBTHK Hozon Paper
Aoi Art estimation paper : whole Oshigata.