Korea formally went under the colonial control of Japan in 1910. While a great number of Koreans migrated to the Japanese mainland for economic reasons especially after the late 1910s, some also migrated to the other parts of Japanese empire, including Sakhalin and Manchukuo. According to the census in 1930, 585 Koreans resided in Taiwan, of which 379 were females and 206 were males. The majority were engaged in commercial business. Females concentrated in the service industry.