|Native name: 猿島
Nickname: Monkey Island
Sarushima as seen from a boat leaving the island
|Area||0.055 km2 (0.021 sq mi)|
|Coastline||1.6 km (0.99 mi)|
|Highest elevation||39.3 m (128.9 ft)|
Sarushima (猿島? Saru-shima, meaning "Monkey Island" in the Japanese language), is a small island located off Yokosuka, Kanagawa in Japan. It is the only natural island in Tokyo Bay. Sarushima was used as a battery by the Tokugawa shogunate during the Edo period, and after the Meiji Restoration in 1868, the island was developed as the Yokosuka Navy Yard.
Sarushima is now uninhabited, and after World War II, it was developed as a marine park. Swimming and camping facilities were built on Sarushima, which makes it is a popular fishing spot. The highest part of the island is still surrounded by a stone wall from the pre-war period, and features the remains of red brick barracks and a powder magazine. The island is accessible by a ferry.
- "猿島" [Sarushima]. Nihon Kokugo Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC 56431036. Retrieved 2012-07-31.
- "猿島" [Sarushima]. Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012. OCLC 153301537. Retrieved 2012-07-29.
- "Matthew Calbraith Perry and Yokosuka" (PDF). Yokosuka. p. 9. Retrieved August 13, 2015.