During his life, he put a frame, which had a word "Yudan" (be off one's guard or inattention) on a wall, and always told his family "The only thing people should do is not to lose his sharpness."
生前、「油断」と書いた額をかけておき、家人に「人は只、油断の二字を戒むべきである。」と言っていた。