Wakizashi in Shirasaya with Koshirae.(NBTHK Tokubetsu Hozon Token)
Bunsei 11th 11 Gatsuhi
(We divide 4 sections for each sword as Saijyo saku, Jyo-jyo saku Jyo saku and regular saku)
This sword belongs to Jyo Jyo Saku ranking.
The blade was polished.
Habaki : copper single Habaki.
Blade length :38.5 cm or 15.16 inches.
Sori :0.6 cm or 0.236 inches.
Width at the hamachi:2.39cm or 0,941 inches.
Width at the Kissaki:0.63 cm or 0.24 inches.
Kasane:0.63cm or 0.248 inches.
The weight of the sword:430 grams.
Era : Late Edo period, Bunsei era. 1829
Shape : Wide and thick sword with longer Kissaki.
Jigane : Ko-Itame-Hada well grained. Beautiful Muji style.
Hamon : Nie-deki. From Hamachi, Suguha then Doranba with deep Nioikuchi. Boshi is round shape.
Special feature:Katou Chouunsai Tsunatoshi is the third son of Katou Izumi no kami Kunihide. He worked as a swordsmith of Uesugi family, the owner of Dewa Yonezawa domain. He studied Douranba Hamon and Bizenden at Suishinshi Masahide in Edo with his elder brother Kato Tsunahide. Tsunahide made many Douranba pieces but most of those not good as the ones made by Masahide. Some of his good pieces are BIzenden with Gunome Midare. He had many students like Koyama Munetsugu, Takahashi Naganobu and Seiryuken Moritoshi. Especially he was intimate with Seiryuken Moritoshi, so that his son, 2 generation Tsunatoshi went to Suo province, in which Seiryuken Moritoshi lived, to study sword making from him several times.
His hamon is very similar to the ones of Koyama Munetsugu’s works, however they had also differences. Tsunatoshi makes Gunome-Midare hamon with its upper side like flowers bloom but Munetsugu’s hamon doesn’t. And the boshi hamon of Munetsugu’s works often Midarekomi style, but Tsunayoshi’s turns back round.
Tsuba:Round iron Tsuba. Plants are engraved.
Fuchikashira, Kojiri:Shakudo plate. Dragonfly is engraved.
Menuki:Shakudo plate. Shishi dogs are engraved.
Kozuka:Shakudo plate. Demon and Zhong Kui are engraved with gold color.
NBTHK Tokubetsu Hozon Token
Aoi Art estimation paper: Whole Oshigata.