Masamoto HOSOKAWA came into real power of the bakufu (Japanese feudal government headed by a shogun) through the Meio Coup, but the domestic conflict intensified due to the succession dispute in the Keicho family and the split in the vassals.
明応の政変によって細川政元が幕府の実権を掌握するも京兆家の家督争い、家臣団の分裂により内乱が激化した。