The Jinshin Yakujo imposed trading restrictions on parties who were considered equivalent to vassals of the Korean Dynasty such as the So clan, and this treaty did not intend to restrict relations with the king of Japan (the Muromachi bakufu), who had the same rank as the Korean Dynasty.
壬申約条において通交に制限を加えられたのは、宗氏のように朝鮮王朝にとって陪臣に当たる者達であり、朝鮮王朝と同格である日本国王（室町幕府）の使節の通交を制限するものではなかった。