Katana in Shirasaya (NBTHK Tokubetsu Hozon paper)
Signature : Mumei (Unsho)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyojyo Saku ranking.
Koto : Jyosaku : Ukai school : Bizen province.
The blade was polished.
Habaki : Gold foiled double Habakai.
Blade length : 66.6 cm or 26.22 inches.
Sori : 1.8 cm or 0.70 inches.
Mekugi : 2
Width at the hamachi : 3.03 cm or 1.19 inches.
Width at the Kissaki : 3.05 cm or 1.20 inches.
Kasane : 0.64 cm or 0.25 inches.
Era : Kamakura period, around Kagen era(1303-1305).
Shape : Osuriage Mumei Katana with large Sori
Jigane : The mixture of Ko-Itame Hada and Ko-Mokume Hada
and well grained with Jinie attach. There is Utsuri on the Ji.
The Shinogi-Ji is Itame Hada with Masame.
Hamon : Nie Deki, Suguha with thick Nioikuchi.
There are double Ha and Uchinoke.
Special feature : Unsho was father of the Unji who worked
at Okayama prefecture Ugai province in Kamakura period.
Generally Hamon and JIgane are similar with Aoe.
Almost Unsho blades are Suguha Hamon and bright.
This blade is Osuriage Mumei and nice shape.
And also the Jigane is beautiful. There are Ustsuri.
The Hamon is Suguha with thick Nioikuchi.
NBTHK Tokubetsu Hozon paper
Aoi Art estimation paper : whole Oshigata.