Although Emperor Uda had already had sons and daughters with FUJIWARA no Inshi, TACHIBANA no Yoshiko, and other consorts, he had to allow Onshi to enter into the Imperial Court in order to improve relations with Mototsune, her father, which had been damaged by the Ako Incident (a political incident in the Heian period that showed that the Fujiwara Clan had more power than the Emperor).
宇多天皇は即位前から既に藤原胤子や橘義子らの妃との間に子女をもうけていたが、阿衡事件などでこじれていた基経との関係改善のためにも、温子入内は不可欠であった。