Komae is a city located in the western portion of Tokyo Metropolis, Japan. It is one of 30 municipalities in the western portion of Tokyo known as the Tama Area. As of 1 April 2021, the city had an estimated population of 83,218, and a population density of 13,000 persons per km2. Based on the 2015 Kanto Ranking, Musashino was the fifth most desirable place to live in Central Japan. The total area of the city is 6.39 square kilometres (2.47 sq mi). It is the smallest administrative city in Tokyo Metropolis both in area and population, and the second smallest in terms of area in the nation.

The Tama River is a major river in Yamanashi, Kanagawa and Tokyo Prefectures on Honshū, Japan. It is officially classified as a Class 1 river by the Japanese government. It is 138 kilometres (86 mi) long, and has a 1,240 square kilometres (480 sq mi) basin.