Right after Sanemasa became as Sachuben, Emperor Gosanjo abdicated the throne to Imperial Prince Sadahito (Emperor Shirakawa) and opened In no cho (Retired Emperor's Office) with Sanemasa as In no tsukasa (official of In no cho), but Gosanjo-in (the Retired Emperor Gosanjo) died soon after.
実政が左中弁となった直後、後三条天皇は貞仁親王（白河天皇）に譲位し院庁を開くと実政は院司となるが、まもなく後三条院は崩御した。