Tachikawa, Tokyo
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![Tama monorail](/Images/godic/202502/14/TamaMonorail08254455.jpg")
Tachikawa(立川市Tachikawa-shi) is a city located in western Tokyo Metropolis, Japan. The city was founded on December 1, 1940.
As of February 1, 2010, the city has an estimated population of 178,064 and a population density of 7,303.69 persons per km². The total area is 24.38 km².