When the Bunsho Coup that the 8th shogun Yoshimasa ASHIKAGA's trusted vassals such as Sadachika ISE and a Zen monk Shinzui KIKEI were ousted from the political world by Katsumoto HOSOKAWA broke out in 1466, Masanori also lost his position.
文正元年（1466年）、細川勝元らにより第8代将軍・足利義政の近臣であった伊勢貞親や禅僧の季瓊真蘂らが政界を追われる文正の政変が起こると、政則も失脚した。