The book examines the history of the Soviet Koreans in 1920-1930 gg. as part of the history of poly-ethnic state - Soviet Union. The author's conclusions are based on the identified new archival materials, generalized results of their predecessors. The main attention is paid to the analysis of the dual nature of Stalin's policy in relation to the Koreans, causes and forms of political repression, applied to the Korean population, whose fate in the Far East was largely dependent on the state of foreign relations between the USSR and Japan. On the basis of statistics identified losses among Koreans in political repression, demographic changes, the position of Koreans in the late 1930s. Publication of the book is timed to the 150th anniversary of the voluntary resettlement of Koreans in Russia.
After clearing of the Far East of interventionists in 1922 – 1923 the main task of the young Soviet state was the establishment of diplomatic relations between Moscow and Tokyo. Representatives of the USSR and Japan had been signed on January, 20th, 1925 "the Convention on main principles of mutual relations between the USSR and Japan". The memorandum of general Tanaka Giiti (on July, 25th, 1927) about bases of a policy in Manchuria and Mongolia predetermined aggressive plans of Japan not only these territories, but also Russia. Koreans in territory of the Soviet Far East have appeared "hostages" of two countries USSR and Japan. Changes in foreign policy between these countries directly were reflected in destiny of the Soviet Koreans. Since 1927 in Korea from the Japanese government repressions and persecutions in relation to Koreans have amplified. In USSR Koreans began to accuse of "the Japanese espionage". Repressions have amplified in 1931 -1932 and in 1937 – 1938.