Japan was a nation on Earth, just off the east coast of Asia. It is composed of four major islands, Hokkaido, Honshu, Kyushu, and Shikoku, and many smaller islands, with its capital in the city of Tokyo. Its primary language was Japanese.
In an alternate timeline accidentally created by Leonard McCoy saving Edith Keeler's life in March 1930, Keeler became a powerful voice in the American Pacifist Movement. She exerted significant influence on the administration of U.S. President Franklin D. Roosevelt much so as to delay the United States' entry into World War II. Japan did not attack Pearl Harbor on December 7, 1941 as it did not consider the US to be a significant threat. By 1944, after the United Kingdom had fallen to the Nazis and Japan had conquered Australia and New Zealand, the Axis finally struck against the United States in Hawaii and drew the nation into war. World War II continued into 1955 and was eventually won by the Axis. (TOS - Crucible novel: Provenance of Shadows)
- Japan article at Memory Alpha, the wiki for canon Star Trek.
- Japan article at Wikipedia, the free encyclopedia.