Japan

Japan is a multi-island off the east coast of the Asian continent on Earth. People or things from Japan are described as Japanese. Tokyo is the capital of Japan.

The USS Nagoya was named after the Japanese city of Nagoya, while the USS Hiroshima (NCC-65201) was named for the Japanese city of. (TOSS; Starfleet Command (RPG))

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. The Japanese were a part of the, along with Germany and Italy. The Axis lost the war in 1945, with Japan surrendering days after the US dropped nuclear weapons on the Japanese cities of and Nagasaki.

People
Enterprise linguist Hoshi Sato was born in Kyoto, Japan on 9 July, 2129. 

Kaito Lee Clarkson was born in 2134 in Tokyo. 

In 2358, Aly Mathias was born in New Tokyo, Japan. (Starship Independence)

Future USS Excelsior (NCC-2000) commanding officer Hikaru Sulu was of Japanese decent, as were USS Enterprise (NCC-1701-D) personnel Keiko O'Brien and Alyssa Ogawa. USS Destiny (NCC-85335) chief engineer Ray Nagata was also of Japanese decent. (Star Trek: Destiny)

Food and drink
Japanese was a variety of green tea.

Ramen were a Japanese dish of noodles served in broth that USS Mumbai (NCC-1496) personnel Root and Wheel were fond of.