In that year, the Songo incident (respectful title incident) involving Imperial Prince Sukehito occurred between the Imperial Court and the Shogunate and Nobumichi was appointed as a representative of the Imperial Court and he left the capital to go to Edo with Naruchika NAKAYAMA, Kinaki OGIMACHI, and others.
この年に朝廷と幕府の間で典仁親王への尊号一件事件が発生したが、信通は朝廷側の代表にたてられ、中山愛親・正親町公明らを伴って江戸へ下向している。