In Kalimantan , the Japanese also killed many Malay intellectuals , executing all the Malay Sultans of West Kalimantan in the Pontianak incidents , together with Chinese people who were already against the Japanese for suspecting them to be threats . Sultan Muhammad Ibrahim Shafi ud-din II of Sambas was executed in 1944 . The Sultanate was thereafter suspended and replaced by a Japanese council . The Japanese also set-up '' Pusat Tenaga Rakjat '' ( PUTERA ) in the Indonesian archipelago in 1943 , although it was abolished the following year when it became too nationalistic . Some of the Indonesian nationalist like Sukarno and Hatta who had returned from Dutch exile began to co-operate with the Japanese . Shortly after his release , Sukarno became President of the Central Advisory Council , an advisory council for south Borneo , Celebes , and Lesser Sunda , set up in February 1945
Pontianak incidents
Pontianak incidents
Borneo