Although Saneyori is generally believed to be the mastermind of the scheme, another theory holds that his brother Morotada, or Morosuke's sons Koretada and Kaneie, were responsible for the scheme.
実頼はこの陰謀の首謀者とされているが、弟の師尹または師輔の子の伊尹、兼家を擬定する説もある。