Aborigines in Taiwan who traditionally live in the mountains were regarded as barbaric and ruthless in Japan’s colonizers’ minds.
In the beginning of the twentieth century, Imperial Japan’s administration among Taiwan’s cities and towns had been settled and established for some years since occupation.
Violent resistance and uprisings had decreased due to the huge disparity between the Japanese military force and the Taiwanese local people.
From the beginning of the plan, Japanese colonial government had decided to adopt a violent way to force the aborigines to obey.
At the same time, they were to develop the frontier guard system comprehensively, whilst first to reassure the aborigines among the southern regions of Taiwan.
There would be a central east to west road to be built, and a transport route for the development of the eastern part of Taiwan would be established.
When the Truku tribe was finally vanquished, Sakuma went back to Japan to report the completion of the aboriginal governance plan to the Meiji Emperor, and then resigned as the governor general of Taiwan.