In 1766 when the Meiwa Incident occurred, he was arrested together with Daini YAMAGATA and Shikibu TAKENOUCHI, and the next year, 1767, he was decapitated and exposed at a prison gate for the great impropriety in the content of his book Heisho zatsudan" (a talk about The Art of War).
1766年（明和3年）の明和事件では山県大弐、竹内式部とともに捕らえられ、翌1767年（明和4年）『兵書雑談』の内容に不敬があったとして打首・獄門の刑に処せられた（牢死説もある）。