Ordering number: 19435
Tanto in Shirasaya with Koshirae.(NBTHK Hozon Paper)
Signature : Hiromasa(Sagami. late Muromachi period)
Suekoto: Jyo saku :Sagami
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyo saku ranking.
The blade was polished.
Habaki : silver single habaki.
Blade length : 28.33 cm or 11.15inches.
Sori : 0.21cm or 0.08 inches.
Mekugi : 1
Width at the hamachi : 2.69 cm or 1.05 inches.
Kasane : 0.49cm or 0.19 inches.
The weight of the sword :175grams.
Era : late Muromachi period
Shape : wide and thick blade with shallow sori and
a little long kissaki, Hirauchi tanto.
Jigane : Koitame hada well grained with jinie attach.
Oohada is mixed in beautiful jigane.
Hamon : Nie deki and Kuichigaiba are mixed. Suguha and gunome
midare are mixed with deep nioikuchi.
There are sunagashi and fine kinsuji in the blade.
Bo-shi is round Hakikake style.
Special feature:The First Hiromasa dates back to the Nambokucho period.
It is said that he was a pupil of Masamune or Hiromitsu in Soshu province.
The clan continued five or six generations to the middle Muromachi period,
circa Eisho era. Their distinctive feature was brilliant Hitatsura-hamon
but quite a few works based on suguha-hamon still survive.
Tsuba: Shakudo, Hamidachi Tsuba.
Fuchikashira: Iron, Ume flowers are engraved with gold and copper color.
Saya: Kawarinuri Saya.
Menuki: Shaudo, bee is engraved with gold color.
Kozuka: Shakudo, pine tree and birds are engraved with gold color.
From Aoi-Art: It is difficult to distinguish generation of Hiromasa
and I do not know what generation it is,
but mitsumune, clear jigane and hamon with deep nioiguchi make
me feel dignity as Soshuuden.
NBTHK Hozon Token
Aoi Art estimation paper: whole Oshigata.