Question: what was left of spain's empire by 1914

title: History of Palau
text: Japan incorporated the islands as an integral part of its empire , establishing the Nanyo - cho government with Koror Island as the capital . From 1914 to 1922 , the Japanese Imperial Navy had been in control . Civilian control was introduced from 1922 , and Palau was one of six administrative districts within the Mandate . Japan mounted an aggressive economic development program and promoted large scale immigration by Japanese , Okinawans and Koreans . Native Palauans soon became a small minority in their own homeland . The Japanese continued the German mining activities , and also established bonito ( skipjack tuna ) canning and copra processing plants in Palau . Japanese economic activity was so extensive during their occupation , that the industrial capital , Koror , was once termed by Japanese officials and tourists as `` chiisai Tokyo '' , meaning `` little Tokyo . ''