After that, when Genji's affair with Oborozukiyo who was Naishi no tsukasa (female palace attendant) was revealed, the Empress Kokiden succeeded in ruining Genji and exiling him to Suma; when her father Daijo-daijin (Grand Minister and ex-Minister of the Right) died and her own health deteriorated due to illness, however, she couldn't stop the Emperor Suzaku from pardoning Genji.
その後内侍司となった朧月夜と源氏の関係が発覚したことで、源氏の失脚を謀り須磨への追放に成功したが、父太政大臣（元右大臣）の死去、また自らの病で力を失い、朱雀帝の源氏召還を止めることができなかった。