sentences:  During the Occupation "gunka" performance was banned.However, the ban was lifted with the signing of the Treaty of San Francisco in 1952, and these "gunka" experienced a mild "boom" in the late 1960s, and by the early 1970s they had regained popularity in Japanese-controlled Micronesia and parts of Southeast Asia.A famous example of a Japanese "gunka" was the song "Sen'yū" written during the Russo-Japanese War.