In 1561, Yoshikane plotted to subdue Nobunaga by gaining Yoshiaki KIRA and Ishibashidono, one family of the Shiba clan and a grand person in Bakufu, as his ally; however, he was expelled since the plot was disclosed before something happened.
1561年に義銀は吉良義昭や、斯波氏の一族で幕府の重鎮の家柄であった石橋殿を味方に引き入れ、信長討伐の陰謀を図るものの、未然に発覚して追放された。