AS25332 Katana: Chōjusai Tsunatoshi (1863)(NBTHK Tokubetsu Hozon Token)

Katana in Shirasaya (NBTHK Tokubetsu Hozon Token)

Signature: Chōjusai Tsunatoshi 長寿斎綱俊　
Bunkyu 3 nen 2 gatsu hi 文久三年二月日　

At our company, we rank swordsmiths’ works as Highest, Superior, Upper, and Ordinary.
This blade is considered a Superior Work among those by Chōjusai Tsunatoshi .

Habaki: copper single habaki
Blade Length: 69.5 cm (27.4 in)
Curvature: 1.5 cm (0.6 in)
Mekugi-ana: 1
Width at Base (Motohaba): 3.161 cm (1.24 in)
Width at Tip (Sakihaba): 2.25 cm (0.9 in)
Thickness (Kasane): 0.77 cm (0.3 in)
Sword Weight: 845 g
Period: Late Edo period, Bunkyū 3 (1863)

Shape:
wide, thick, and slightly deeply carved blade with long and accute Kissaki.
Jigane: Koitame hada with intense grain patterns.
Hamon: Ko-nie base thick and rounded Gunome-midare with Sunagashi. Boshi is midarekomi and rounded.

Features: Chounsai Tsunatoshi was a renowned smith of the late Edo period who studied under Suishinshi Masahide. In 1856, he passed on his name to his son Koretoshi(2nd gen Tsunatoshi) and himself adopted the name Chōjusai 長寿斎　with Chōju meaning “longevity.” He passed away in 1863. Judging from the period, this blade is likely a joint work of the first and second generations. It is a piece of great appeal, with a wide body and a robust thickness, reflecting a highly attractive workmanship.

NBTHK Tokubetsu Hozon Certificate
Aoi-Art estimation paper
whole Oshigata