CHOUNSAI TSUNATOSHI(長運斎綱俊) was a Japanese swordsmith in Yonezawa, Dewa province. His name was succeeded by his second son.
- Dewa province (Yamagata prefecture today)
- SUISHINSHI MASAHIDE(水心子正秀)*teacher
- Kato Toshihide(加藤綱英)*elder brother
- KOYAMA MUNETSUGU (固山宗次)*apprentice
- UNJU KOREKAZU(運寿是一)*nephew
- Chounsai Tsunatoshi’s real name was Kato Hachiro, he was born as the 3rd son to Kato Izumi-kami Kunihide(加藤和泉守国秀). His elder brother was a renowned TORANBA Hamon maker, Kato Tsunahide.
- With his brother, Tsunatoshi found Kato school(加藤一門), which was well-known for making Bizen Tradition style swords. There’re many famous swordsmiths in the school, namely Koyaa Munetsugu, Sekido Unju Korekazu, Kato Naganobu(高橋長信) and Seiryuken Moritoshi(青竜軒盛俊).
- After the swordsmith’s second son Koretoshi(是俊) succeeded the name of Chounsai Taunatoshi in 1856, he changed his smith name to Chojusai Tsunatoshi(長寿斎綱俊). Choju(長寿) in his new name means “Longevity”.