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19th-century view of Koishikawa ("東京小石川遠景").
Japanese artillery unit, at the Koishikawa arsenal, Tokyo, in 1882. Photographed by Hugues Krafft.

Koishikawa (小石川) is a district of Bunkyo, Tokyo. It consists of five sub-areas, 1-5 chome (1~5丁目). It is located nearby with the same name are two well regarded gardens: the Koishikawa Botanical Garden (related to the University of Tokyo) in Hakusan, and the Koishikawa Korakuen Garden in Korakuen.

Train stations for accessing this locality include Hakusan Station (白山駅, Hakusan-eki), Kōrakuen Station (後楽園駅, Kōrakuen-eki), and Myōgadani Station.

The Koishikawa arsenal was an important military installation during the Meiji era.


Bunkyo operates the local public elementary and middle schools.

Koishikawa High School is operated by the Tokyo Metropolitan Government Board of Education. In addition the metropolis operates the Koishikawa Secondary Education School.

Coordinates: 35°42′54″N 139°44′44″E / 35.71500°N 139.74556°E / 35.71500; 139.74556