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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, little stoney river) 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 [1] is operated by the Tokyo Metropolitan Government Board of Education.

In addition the metropolis operates the Koishikawa Secondary Education School [2].

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