Kōjimachi (麹町?, also 麴町) is a neighborhood in Chiyoda, Tokyo.
Prior to the arrival of Tokugawa Ieyasu, it was known as Kōjimura (糀村?). The area developed as townspeople settled along the Kōshū Kaidō. In 1878 Kōjimachi became a ward in the city of Tokyo. It was the forerunner of Chiyoda which is now a special ward. Kōjimachi was the birthplace of Japanese general and prime minister Hideki Tojo, who was hanged for war crimes after World War II.
The Kōjimachi ward was larger than past day Kōjimachi. The area centered upon Kōjimachi including the districts of the Banchō area, Kudanminami, Kioichō, Hirakawachō and Hayabusachō is sometimes referred as the Kojimachi area (麹町地区).
The Japan division of Sunoco is headquartered in the Trusty Kojimachi Building in Kōjimachi.
When Bandai Visual began in August 1983, its headquarters was in Kōjimachi. In December of that year the headquarters moved to Roppongi, Minato, Tokyo.
Coordinates: 35°41′13″N 139°44′18″E / 35.68694°N 139.73833°E