However, Kansuke never lived to see his plan succeed; thinking it to have failed, he charged headlong into the enemy ranks, dying in battle.

[3] He came to Kai and began to serve Takeda Shingen in 1543, receiving a position as an infantry commander (ashigaru-taishō 足軽大将).

[2] He led the Pincer movement at the fourth Battle of Kawanakajima, but as he believed it to be a failure, he charged into the enemy ranks,[6] being killed in action with his two chief retainers, Osaragi Shōzaemon (大仏庄左衛門) and Isahaya Sagorō (諫早佐五郎).

[2] Kansuke was an ancestor of Yamamoto Yaeko of Aizu, a famed Bakumatsu period woman warrior.

[8] The Heihō Ōgisho (兵法奥義書), a treatise on strategy and tactics attributed to Kansuke, is included in the Takeda family chronicle, the Kōyō Gunkan.