Together with Yoshitaka HATAKEYAMA (a brother-in-law of Rokuro) in Kawachi, Motonaga solidly opposed the decision of Rokuro (Harumoto) that equaled the abandonment of the Sakaikubo government they had spent a great deal of efforts to build, but instead of being accepted, Motonaga's opinion resulted in making a big gulf between him and Rokuro.
せっかく苦労して築いてきた堺幕府の放棄にも等しい六郎（のちの晴元）の決断には、河内の畠山義堯（六郎の義兄弟）と共に断固反対したが、聞き容れてもらえなかったばかりか、かえって大きな溝をつくってしまう。