Why was Tokyo Rose in Prison?

Answer 1

She was visiting Japan when she was stranded at the outbreak of World War II. In 1943 she began radio announcing for a Propaganda program beamed at U.S. troops, and eventually she became one of 13 women announcers, all native speakers of American English, collectively known as Tokyo Rose. After the war she was convicted of treason and served six years in a U.S. prison. Mitigating information later came to light, and she was pardoned in 1977

He ended up stranded in Japan after the Japanese bombed Pearl Harbor (1941) and the United States entered WOrld War II. The Japanese government regarded her as an "enemy alien" after she refused to become a Japanese citizen.