Unfortunately, the Japanese succeeded in their occupation, for the most part. One small Australia force, was able to continue the fight, largely due to massive amounts of support from the East Timorese people.
Japanese retaliation for the Timorese supporting the Allies, called Sparrow Force,more than 50,000 people dead. this loss of life was into context, it is estimated that the population of the region at the time was somewhere in the region of half a million: they was literally decimated. When the Japanese surrender took place in 1945, control of Timor Leste was officially returned to Portugal.