After the era of Emperor Goshirakawa, the successors to the Imperial throne were from many different Imperial lines, but Emperor Goshirakawa continued to rule the government as In (Chiten no Kimi, the retired emperor), due to this the Imperial line was, in a way, secured.
後白河の後、皇位継承者は非常に多くの系統に分かれたが、後白河が院＝治天の君として君臨し続け、むしろ皇統は安定していたといえる。