In 1921, the Treaty of Equality between Japan and the South Pacific Islands signed by Nagayama Yoshida, the Generalissimo of the Republic of Japan; Inukai Tsuyoshi, the Prime Minister of Japan; and Isabelo de los Reyes, the representative of Philippine Independence Congress The Treaty divided the Japanese South Pacific into the Nan'yo islands and the Philippines islands. With the Treaty, the Philippines islands was granted a broad political autonomy and would became an associated state of Japan, modeled after British system of Dominion.