Koganei is a city located in the western portion of Tokyo Prefecture, Japan. As of 1 March 2021, the city had an estimated population of 123,698 in 61,832 households. The total area of the city is 11.30 square kilometres (4.36 sq mi) so the population density is about 11,000 persons per km².

Tama Cemetery in Tokyo is the largest municipal cemetery in Japan. It is split between the cities of Fuchu and Koganei within the Tokyo Metropolis. First established in April 1923 as Tama Graveyard , it was redesignated Tama Cemetery in 1935. It is one of the largest green areas in Tokyo.