of the immigrants were arrested. In Official Correspondence of 1949, Shigeru Yoshida, the prime minister of Japan, proposed the deportation of all Zainichi Koreans to Douglas MacArthur and said the Japanese government would pay all of the cost. Yoshida stated that it was unfair for Japan to purchase food for illegal Zainichi Koreans, claiming that they did not contribute to the Japanese economy and that they supposedly committed political crimes by cooperating with communists. Loss of Japanese nationality Immediately following the end of World War II, there were roughly 2.4 million Koreans in Japan; the majority repatriated to their ancestral homes in the southern half of the Korean Peninsula, leaving only 650,000 in Japan by 1946. Japan's defeat in the war and the end of its colonization of the Korean Peninsula and Taiwan left the nationality status of Koreans and Taiwanese in an ambiguous position in terms of law. The Alien Registration Ordinance (, Gaikokujin-tōroku-rei) of 2 May 1947 ruled that Koreans and some Taiwanese were to be provisionally treated as foreign nationals. Given the lack of a single, unified government on the Korean Peninsula, Koreans were provisionally registered under the name of Joseon (Korean: , Japanese: Chōsen, ), the old name of undivided Korea. In 1948, the northern and southern parts of Korea declared independence individually, making Joseon, or the old undivided Korea, a defunct nation. The new government of the Republic of Korea (South Korea) made a request to the Supreme Commander of the Allied Powers, then the occupying power of Japan, to change the nationality registration of Zainichi Koreans to Daehan Minguk (; Japanese: Daikan Minkoku, ), the official name of the new nation. Following this, from 1950 onwards, Zainichi Koreans were allowed to voluntarily re-register their nationality as such. The Allied occupation of Japan ended on 28 April 1952 with the San Francisco Peace Treaty, in which Japan formally abandoned its territorial claim to the Korean Peninsula, and as a result, Zainichi Koreans formally lost their Japanese nationality. The division on the Korean Peninsula led to division among Koreans in Japan. Mindan, the Korean Residents Union in Japan, was set up in 1946 as a pro-South offshoot of (League of Koreans in Japan), the main Korean residents' organisation, which had a socialist ideology. Following the May Day riots of 1952, the pro-North organisation was made illegal, but it re-formed under various guises and went on to