Marunouchi

Marunouchi () is an area in Chiyoda, Tokyo, Japan, located between Tokyo Station and the Imperial Palace. The name, meaning "inside the circle", derives from its location within the palace's outer moat. Marunouchi is the core of Tokyo's central business district as well as one of the main financial centres in Japan. 20 of the Fortune Global 500 companies are headquartered in the area as of 2021, while many other such companies based outside Japan have Asian or Japanese offices there. Together with the neighbouring districts of Yūrakuchō (有楽町) and Ōtemachi (大手町), Marunouchi is part of a larger business district sometimes referred to as Daimaruyū (大丸有).

==History== left|thumb|Marunouchi in the aftermath of the 1923 Great Kantō earthquake; the NYK building (foreground), the [[Marunouchi Building (midground), Tokyo Station (background)]] In 1590, before shogun Tokugawa Ieyasu entered Edo Castle, the area now known as Marunouchi was an inlet of Tokyo Bay and had the name Hibiya. With the expansion of the castle, this inlet was filled, beginning in 1592. A new outer moat was constructed, and the earlier moat became the inner moat. The area took the name Okuruwauchi ("within the enclosure"). Daimyōs, particularly shinpan and fudai, constructed their mansions here, and with 24 such estates, the area also became known as daimyō kōji ("daimyō alley"). The offices of the North and South Magistrates, and that of the Finance Magistrate, were also here. thumb|Tokyo Station after the Great Raid of 25 May 1945: the foundation of the Shin-Marunouchi Building, whose construction was interrupted due to the war, was used as a fire-fighting reservoir.|left Following the Meiji Restoration, Marunouchi came under control of the national government, which erected barracks and parade grounds for the Imperial Japanese Army. In 1890 Iwasaki Yanosuke, brother of the founder (and later the second leader) of Mitsubishi, purchased the land for 1.5 million yen. As the company developed the land, it came to be known as Mitsubishi-ga-hara (the "Mitsubishi Fields"). Much of the land remains under the control of Mitsubishi Estate Co., and the headquarters of many companies in the Mitsubishi Group are in Marunouchi.