Main Page | See live article | Alphabetical index Tachikawa (立川市; -shi) is a city located in Tokyo, Japan. As of 2003, the city has an estimated population of 168,079 and the density of 6,894.13 persons per km². The total area is 24.38 km². The city was founded on December 1, 1940. External Links Official website in Japanese This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.