At the early stages of the Japanese rule in Taiwan, the governor office conducted an investigation on the customs as are consolidated and reflected in its relevant policies and legislations under the Ching dynasty in Taiwan. It began from the investigation on land, which was done for land tax; and, to secure the forest resources, was also extended into the wild unoccupied fields and open counties. During the course, the land of the natives’ was incorporated as part of the state-owned property. The investigation was closely woven with the appeasement and conciliation policy of the Japanese government. This essay, then, is to analyze the governor’s administration during that period with an emphasis on the military and police power thereby invoked for that purpose.