He became giso (position to report congress decision to the emperor) and had been involved in mediation between the imperial court and the bakufu on the issues of the imperial grant for concluding a treaty, the imperial sanction to Mito Domain, a Shogun's heir and the marriage of Imperial Princess Kazunomiya Chikako as buke tenso (liaison officers between the imperial court and the military government) in 1859.
また議奏となり、安政6年（1859年）には武家伝奏として、条約勅許問題、水戸藩降勅、将軍継嗣問題、和宮親子内親王降嫁など、朝幕調停に大きく関与した。