Ordering number : 18147
Katana in Shirasaya(NBTHK Hozon Paper)
Signature : Kouzuke Koku Nitta Ju Osumi Toshihira Saku(Living National Treasure)
Showa Hinoe-Uma Nen 5 Gatsu 5 Nichi(May 5th 1966)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku
Jyo saku and regular saku)
This blade belongs to Saijo Saku ranking.
The blade was polished.
Blade length : 71.9 cm or 28.30 inches.
Sori : 2.3 cm or 0.90 inches.
Mekugi : 1
Width at the hamachi : 3.28 cm or 1.29 inches.
Width at the Kissaki : 2.30 cm or 0.90 inches.
Kasane : 0.75 cm or 0.29 inches.
Era : Modern time.1966
Shape : Wide and thick blade with large Sori. nice shape Katana.
Jitetsu : Ko-Itame hada well grained with Jinie attach.
The Jigane is beautiful.
Hamon : Nie Deki, Gunome Midare.
Special feature : Osumoi Toshihira is the top sword maker in Japan as National treasure.
Toshihira was born at Showa 7th(1932) Jan 23rd at Oota city Gunma prefecture.
He worked under the Miyairi Shohei sword maker who got the national treasure.
He studied Raikunitoshi, aoe, sosyu style from him.
He decided to open up his own business at 1960 and do his own thing from his master and made swords.
At Showa 48,52,53,He got Masamune syo prize which is the top
ranking prize in NBTHK Shinsakuto shinsa.
His technique is quite high valuated from many judges.
In 1997, he got the title of Living National Treasure.
He passed away in 2009 at age of 77.
From Aoi Art: Osumi Toshihira is famous for studing Suguha of Bicchu Aoe school. This blade has Gunome Midare Hamon.
We think that this blade has the values as a reference.
Toshihira got many prizes in his life.
Generally He made suguha hamon but this sword is Cyoji midare
active temper line.
NBTHK Hozon Paper
Aoi Art estimation paper : whole Oshigata.