Which of the following periods of Japanese history is the most recent?
After World War II had ended, Japan was devastated. All the large cities (with the exception of Kyoto), the industries and the transportation networks were severely damaged. A severe shortage of food continued for several years.
The occupation of Japan by the Allied Powers started in August 1945 and ended in April 1952. General MacArthur was its first Supreme Commander. The whole operation was mainly carried out by the United States.
Japan basically lost all the territory acquired after 1894. In addition, the Kurile islands were occupied by the Soviet Union, and the Ryukyu Islands, including Okinawa, were controlled by the USA. Okinawa was returned to Japan in 1972, however, a territorial dispute with Russia concerning the Kurile Islands has not been resolved yet.