When he went down to Nagasaki City by the order of SANJO in 1867, he formed a friendship with Ryoma SAKAMOTO and Nobuyuki NAKAJIMA, discussed a plan for Taisei Hokan (transfer of power back to the Emperor), and proposed the draft plan to Tomomi IWAKURA.
慶応3年（1867年）、三条の命で長崎市に赴いた際に坂本龍馬・中島信行と親交を結び、大政奉還の策を協議、岩倉具視に建策する。