He fell in love with Kayano-tsubone, the wife of Yoshitsura ISSHIKI, and he then attempted to assassinate Yoshitsura by ordering his own subordinate, Nobuhide TAKEDA to kill him.
一色義貫の正室である茅野局に横恋慕し、部下である武田信栄に命じて義貫を暗殺させようとする。