In 972, after Koremasa died after about a year in his position, there was a fierce battle between his brothers, Kanemichi and Kaneie, to take over the position of regent.
同三年、伊尹が在職一年あまりで亡くなると、その弟の兼通・兼家の間で、摂関職を巡って熾烈なる争いが行われた。