In 1941, the Japanese entered World War II by attacking Pearl Harbor, Hawaii in the United States of America, prompting the latter's entry into the war a day later. (TNG: "The Enemy"; DS9: "Far Beyond The Stars") The Japanese were a part of the Axis, along with Germany and Italy, and their aviators were known for their kamikaze suicide air attacks on Allied forces. The Axis lost the war in 1945, with Japan surrendering days after the US dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki.
USS Excelsior commanding officer Hikaru Sulu was of Japanese descent, as were USS Enterprise-D personnel Keiko O'Brien and Alyssa Ogawa. (Star Trek: The Original Series; Star Trek: The Next Generation)
Food and drink
Japanese was a variety of green tea.
- The USS Nagoya was named after the Japanese city of Nagoya, while the USS Hiroshima was named for the Japanese city of Hiroshima. (TOSS; Starfleet Command (RPG))
- There were both Baton Rouge-class (TOS novel: The Final Reflection) and Renaissance-class (Star Trek: The Next Generation Technical Manual) ships named Hokkaido, after Japan's second largest and northernmost island.
- USS Kyushu, a New Orleans-class frigate, was named after the third largest and southwestmost of the islands of Japan. Kyushu was one of 39 Starfleet vessels destroyed at the Battle of Wolf 359. (TNG: "The Best of Both Worlds")