Katana in Shirasaya (NBTHK Tokubetsu Hozon Paper)

Signature : Yasutomo

The blade was polished.
Blade length : 60.5 cm or 23.81 inches.
Sori : 1.5 cm or 0.59 inches.
Mekugi : 1
Width at the hamachi : 3.17 cm or 1.24 inches.
Width at the Kissaki : 2.12 cm or 0.83 inches.
Kasane : 0.60 cm or 0.23 inches.
Era : Edo period Meireki era. 1655
Rikuzen province : Shinto ; Jyosaku ranking : Wazamono cut well sword ranking.
Shape : The blade is wide and thick with deeper sori good looking shape.
Jitetsu : Itame hada well grained with jinie attach chikei work.
Hamon : Wavy notare suguha with very thick nioikuchi with a lot of ashi.
In Ha, there are many sunagashi and small kinsuji work.

Special feature : He was called Amame Gozaemon and studied at Yasusada. After he studied at his master, and moved back to his place, he was changed his name to Yasutomo which received one character from his master.
He helped to make sword for Daimyo Date Tsunamune who tried to make sword.
His swords are very similar with his master Yasusada probably he made swords for his master.
Yasurime of the blade is also as same as Yasussada.
This sword is rather wide and thick healthy blade also nice Jigane and Hamon.

NBTHK Tokubetsu Hozon Paper
Aoi Art estimation paper : whole Oshigata.