The Ministry of Colonial Affairs (拓務省, Takumushō) was a cabinet-level government ministry of the Empire of Japan from 1929 to 1942.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (August 2018)

The original Ministry of Colonial Affairs was the short-lived Hokkaidō Colonization Office, established in the early Meiji period by Prime Minister Kuroda Kiyotaka to protect Japan's sparely populated northern frontier against encroachment by the Russian Empire by encouraging the settlement of ex-soldiers as militia-farmers in Hokkaidō.

This was followed by the even shorter-lived Colonial Administration Department within the office of the Governor-General of Taiwan. Established on 2 April 1896 by General Takashima Tomonosuke, it was intended to encourage Japanese investment and settlement in Taiwan, after the acquisition of that island by Japan as a result of the First Sino-Japanese War. The office was abolished on 2 September 1897.

Japan acquired Korea, Karafuto (South Sakhalin), and the Kwantung Leased Territory as a result of the Russo-Japanese War, and a Colonization Bureau (拓務局, Takumukyoku) was established within the Japanese Home Ministry on 22 June 1910. The bureau came under much criticism for its ineffectiveness,^{[by whom?]} and on 10 June 1929, it was elevated into a separate cabinet-level ministry under Prime Minister Giichi Tanaka.

The new ministry was intended to coordinate emigration and settlement in all exterior territories of Japan, and had supervisory responsibility for Japanese controlled territory of Korea (朝鮮, Chōsen), of Taiwan (台湾, Taiwan), of Karafuto (樺太, Karafuto) (or South Sakhalin), of Nanyo (南洋, Nan'yō) (or South Seas Mandate), and the Kwantung Leased Territory (関東, Kantō).

However, the ministry did not actually sponsor emigration to those territories. It only provided advice and cooperated with private emigration sponsorship companies.

The ministry also oversaw operations of the South Manchuria Railway Company, but its authority did not extend to Manchuria due to strong resistance by the Ministry of War, who wanted to keep control over the future economic development of Manchuria to itself.

Likewise, the Governor-General of Korea, who was accustomed to virtual autonomy, rejected the new ministry's control and continued to administer Korea with little interference.

On 1 November 1942, the Ministry of Colonial Affairs was abolished, and its functions divided between the Japanese Foreign Ministry and the newly created Ministry of Greater East Asia.

• Beasley, W.G. (1991). Japanese Imperialism 1894-1945. Oxford University Press. ISBN 0-19-822168-1.
• Ching, Leo T.S. (2001). Becoming Japanese: Colonial Taiwan and the Politics of Identity Formation. University of California Press. ISBN 0-520-22553-8.
• Myers, Raymond; Mark R Peattie (1987). The Japanese Colonial Empire, 1895-1945. Princeton University Press. ISBN 0-691-10222-8.
• Townsend, Susan C. (2000). Yanihara Tadao and Japanese Colonial Policy: Redeeming Empire. RoutledgeCurzon. ISBN 0-7007-1275-5.