There was a popular view that Samurai in Mikawa were killed without showing their backs to the enemies in the Battle of Mikatagahara, and furthermore, it is also recorded (in "Hagakure-oboegaki" (a memorandum on Bushido)) that the blind faithfulness of samurai in Mikawa, including Yoshinobu and Mototada TORII, was called by the enemies "dog-like faithfulness."
三方ヶ原の戦いで三河武士が背を向けず死んで行ったという俗説をはじめ、吉信、鳥居元忠らの盲目的ともいえる三河武士たちの忠節ぶりは敵から『犬のように忠実』と言われた（『葉隠覚書』）。