Initially, they made a pupppet of Tanenaga's younger brother Nagatsune HATAKEYAMA, the master of the Eastern Capital Offices, but due to interference from Harumoto, Nagatsune was dedposed; then, they backed Nagatsune's younger brother Masakuni HATAKEYAMA, the governor of Harima province? and Ariuji HATAKEYAMA from the Soshu family to take the form of joint sovereignty, whereby Nagamasa, along with Naganori, held the reins of the Hatakeyama clan.
当初は稙長の弟・畠山長経（左京大夫）を傀儡として擁立したが、晴元の干渉もあって長経は廃され、今度はそのまた弟の畠山政国（播磨守?）と総州家より畠山在氏を擁立し、尾州家と総州家の共同統治という形式を採ることにより、長政は長教と共に畠山氏の実権を握ることになる。