Ordering number: AS19520
Tanto in Shirasaya with Koshirae(NBTHK Tokubetsu Hozon Token)
Signature : Gassan Sadayoshi Saku Kore Bunkyu Gannen Tori Gogatsu
Shinshinto : Jyosaku : Settsu
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyojyo saku ranking.
The blade was polished.
Habaki : Gold foiled single Habaki.
Blade length : 23.4 cm or 9.21 inches.
Sori : 0.1 cm or 0.04 inches.
Mekugi : 1
Width at the hamachi : 2.4 cm or 0.94 inches.
Kasane : 0.57 cm or 0.22 inches.
The weight of the sword 135 grams.
Era : The end of the Edo period.
Shape : Wide and thick Tanto with Ububa, there’re the Kenmaki-ryu and the Gomabashi carved into the blade.
Jigane : Beautiful bluish Ko-itame-hada is grained well, which looks Muji.
Hamon : Nie-deki, Gunome-midare with Ashi, there’re Sunagashi and Ashi in places.
Special Feature : Gassan Sadayoshi, whose real name was Gassan Yahachiro, was born in Sasagawa village of Dewa Murayama ward.
After learning under his father Okuyama Yasburo Sadachika, he moved to Edo city and became an apprentice of Suishinshi Masahide at the age of 20.
In the 4th of Tenpo era, he moved to Osaka and later on adopted a child, he is the smith later called Gassan Sadakazu.
Sadayoshi passed away on Feb 1st, the 3rd of Meiji period at age of 71.
Saya : Gold Nashiji Saya with the Makie of Shishi dog and the poeny .
Tsuba : Syakudo Nanakoji Tsuba.
Menuki : The Shishi dog carving painted with gold color.
Kozuka : Syakudo Nanakoji, the Shishi dog carving painted with gold color.
Kojiri : Shakudo Nanakoji, the poeny carving painted with gold color.
From Aoi Art : Gassan Sadayoshi is well known for being a foster-father of Gassan Sadakazu, they succeeded in the reproduction of Ayasugi-hada, the signature Hada pattern of the Gassan school.
Like this Tanto, Gassan Sadayoshi’s swords with the carving is very rare.
NBTHK Tokubetsu Hozon Token
Aoi Art estimation paper: whole Oshigata.