Inshi had taken major roles in politics not only during the heights of the cloister government between Emperor Shirakawa and Emperor Gotoba, but also until the beginning of the Muromachi period when the cloister government was extinguished (except certain period).
白河～後鳥羽までの院政最盛期が経過した後も、実質的に院政が消滅する室町時代前期まで（一部の期間を除いて）、院司は政治の枢要を担う重要な役割を果たしていった。