In 1684, Masatoshi HOTTA, Tairo (the highest post in the bakufu government to the person in the post) was slain with a sword in the Edo castle by Masayasu INABA, his cousin and a wakadoshiyori officer.
特に1684年、大老・堀田正俊が江戸城内にて若年寄で従兄・稲葉正休に斬殺された事件が起きた。