As for the demographic structure, unlike Korea, Taiwan, and the Kwantung Leased Territory, the population of immigrants, such as Japanese or Taiwanese, was larger than that of the indigenous islanders.
住民構成は、朝鮮・台湾・関東州とことなり、現地人である島民よりも日本人や台湾人などの移住者の人口が多かった。