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Kantei keys
- Hamon. The 丁子乱れ (chōji-midare), his strength according to Japanese Wikipedia, with a technique not inferior to that of Naka-Kawachi.
- Sugata. Many of his known blades are katana (打刀, uchigatana) with the Tokubetsu Hozon paper, according to Japanese Wikipedia.
- Mei. 肥後守国康 (Higo no Kami Kuniyasu), on the wakizashi that the NBTHK showed in 2020.
What is not on record
The sources consulted do not describe the jihada, the bōshi or the tang of his blades, nor do they give keys for distinguishing the generations.