On January 8, 1695 he invited shogunal cabinet ministers and daimyo (territorial lords) to a Noh-dancing performance during which he struck down Mondayu FUJII who was his senior vassal in a private, locked room.
元禄7年（1694年）11月23日、幕閣や諸大名を招いて行われた能舞興行の際、人払いをした密室で重臣の藤井紋太夫を刺殺した。