There was a contradiction between Korea, which wanted to maintain diplomatic relations just in the Japanese consular office in Busan like Dejima in Nagasaki, and Japan, which attempted to unify the diplomatic route by depriving the So clan in Tsushima of their diplomatic rights and urged Korea to open the country to the world.
長崎の出島のごとき釜山の倭館に限定した国交を望む朝鮮側と、対馬宗氏から外交権を取り上げて外交を一元化し、開国を迫る日本との間に齟齬が生じたのである。