After Takashi HARA was assassinated, Korekiyo TAKAHASHI was hastily invited to be the new president, for which the party split into two factions; one supporting Takahashi led by Sennosuke YOKOTA, and the other which opposed led by Takejiro TOKONAMI that separated from the party and organized the Seiyu-hon Party.
原敬の暗殺後、急遽新総裁に迎えられた高橋是清を支持する横田千之助と、それに反対する床次竹二郎の2派に分裂、床次らは分離して政友本党を結成する。