Colonial administration of the Korean Peninsula under the Empire of Japan following the 1910 annexation, governed through the Government-General of Chosen.
Ended with Japan's surrender in World War II (2 September 1945, formal Japanese Government-General authority ceded 12 September 1945), followed by Soviet/US occupation and division of Korea.
The standard accessible modern history of Korea, with the Japanese colonial period (1910-1945) at its core, in print from Norton.