Marunouchi (丸の内) is a commercial district of Tokyo located in Chiyoda between Tokyo Station and the Imperial Palace. The name, meaning "inside the circle", derives from its location within the palace's outer moat. It is also Tokyo's financial district and the country's three largest banks are headquartered there.
In 1590, before Tokugawa Ieyasu entered Edo Castle, the area now known as Marunouchi was an inlet of Edo 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").
Daimyo, particularly shinpan and fudai, constructed their mansions here, and with 24 such estates, the area also became known as daimyō kōji ("daimyo alley"). The offices of the North and South Magistrates, and that of the Finance Magistrate, were also here.
Those moved in 1890, and 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, and the headquarters of many companies in the Mitsubishi Group are in Marunouchi.
The government of Tokyo constructed its headquarters on the site of the former Kōchi han in 1894. They moved it to the present Tokyo Metropolitan Government Building in Shinjuku in 1991, and the new Tokyo International Forum and Toyota Tsusho Corporation now stands on the site. Nearly a quarter of Japan's GDP is generated in this area.
Places in Marunouchi 
- Marunouchi Oazo
- Marunouchi Building
- Shin-Marunouchi Building
- Tokyo Central Post Office (closed)
- Tokyo International Forum
- Mitsubishi Ichigokan Museum, Tokyo
- Tokyo Station, the city's main intercity rail terminal
- Meiji Seimei Kan
Companies based in Marunouchi 
||This section needs additional citations for verification. (December 2009)|
- Mitsubishi Group companies:
- Nikko Citigroup
- Toyota Tsusho
Marunouchi also houses the Japan offices of Aeroméxico (Pacific Century Place Marunouchi), Citigroup, Nikko Cordial, Nikko Citigroup, Banca Commerciale Italiana, Rabobank, JPMorgan Chase, Bank Negara Indonesia, Bank of India, Bayerische Landes Bank, Bloomberg, BT Asia Securities, First National Bank of Boston, KPMG, Latham & Watkins, Mellon Bank, Morgan, Lewis & Bockius, Morrison & Foerster, Overseas Union Bank, Philadelphia National Bank, PricewaterhouseCoopers, Ropes & Gray, Royal Bank of Scotland Group, Royal Insurance, Standard Chartered Bank, Standard & Poor's, Deloitte Touche Tohmatsu, Bain & Company.
Rail and subway stations 
- Nijūbashimae Station (Chiyoda Line)
- Otemachi Station (Chiyoda Line, Hanzomon Line, Marunouchi Line, Toei Mita Line, Tozai Line)
- Tokyo Station (Chūō Line, Keihin-Tohoku Line, Keiyo Line, Marunouchi Line, Shinkansen, Sōbu Line, Yamanote Line, Yokosuka Line)
- Nakata, Hiroko, "Tokyo Station's Marunouchi side restored to 1914 glory", Japan Times, 23 October 2012, p. 3
- "Corporate Information." Calbee. Retrieved on March 27, 2010.
- "Company Overview." Konica Minolta. Retrieved on May 12, 2009.
- "About The Bank of Tokyo-Mitsubishi UFJ, Ltd." The Bank of Tokyo-Mitsubishi UFJ. Retrieved on December 7, 2009.
- "Fact Sheet." Mitsubishi Corporation. Retrieved on September 28, 2011.
- "Corporate Profile." Tokio Marine Nichido. Retrieved on July 24, 2011. "Address of Head Office 2-1 Marunouchi 1-chome, Chiyoda-ku, Tokyo"
- "com03.jpg." Aeroméxico. Retrieved on October 13, 2010.
- "Office Locations Asia." Standard & Poor's. Retrieved on August 12, 2011. "Japan 28 F Marunouchi Kitaguchi Bldg 1-1 Marunouchi, Chiyoda-ku Toyko, Japan 100-0005 "
- "World Airline Directory." Flight International. March 30, 1985. 88." Retrieved on June 17, 2009.
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