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 Tokyo University) 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.