Gasso Omi - Gasso Omi

...There is also a theory that it refers to works made by the first four generations. Particularly famous is the fifth generation Omi Tadatsugu (secular name Zenbei, Buddhist name Seishinshinshi) from the Genroku and Hoei periods (1688-1711), who had short hair and was called "Gassou Omi" or "Gassou Zenbei." He is said to have been the first to use the "Omi" branding (prior to that, ink inscriptions were used), and also to have been the first to carve the "Ayasugi" plane pattern on the inside of the body....

*Some of the terminology that refers to "Gassou Omi" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…また4世までの作をいう説もある。とくに有名なのが元禄･宝永期(1688‐1711)の5世近江忠次(俗名善兵衛，法名性真信士)で，頭髪を散切（ざんぎり）にしていたので〈がっそう近江〉〈がっそう善兵衛〉などといわれた。〈近江〉の焼印をはじめて用いた(それ以前は墨書銘)といい，また胴の内側に綾杉というかんな目を彫ることをはじめた人という。…

※「がっそう近江」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報