In July, 1858, Kuniomi received the word from Umon HOJO that Nariakira SHIMAZU planned to raise an army and proceed to Kyoto, therefore, he went up to Kyoto himself under the pretext of a request by Taketoki KIKUCHI's to write an inscription on a stone monument.
安政5年（1858年）6月、島津斉彬の率兵上洛の情報が北条右門から入り、国臣は菊池武時碑文建立願いの名目で上京。