Within the Shinshu sect Otani school whose head temple was Shinshu-honbyo Mausoleum, there was a confrontation between conservatives and reformists over several issues such as differences in the interpretation of doctrine and the direction of the movement, which developed into a theological dispute called Ohigashi-sodo Strife in 1969.
1969年（昭和44年）、京都の真宗本廟を本山とする真宗大谷派内部において、教義上の解釈や宗派の運営方針等をめぐって保革が対立し、紛争に及んだ（お東騒動）。