Unable to force the Koreans into accepting a new set of diplomatic symbols and practices, the Japanese began to change them unilaterally. To an extent, this was a consequence from the abolition of the domains in August 1871, whereby it meant that was simply no longer possible for the Sō family of Tsushima to act as intermediaries with the Koreans. Another, equally important factor was the appointment of Soejima Taneomi as the new minister of foreign affairs, who had briefly studied law at Nagasaki with Guido Verbeck. Soejima was familiar with international law and pursued a strong forward policy in East Asia, where he used the new international rules in his dealings with the Chinese and the Koreans and with the Westerners. During his tenure, the Japanese slowly began to transform the traditional framework of relations managed by the Tsushima domain into the foundation for the opening of trade and the establishment of ""normal"" interstate, diplomatic relations with Korea.