The Japanese School in London (ロンドン日本人学校 Rondon Nihonjin Gakkō?) is a Japanese international school in Acton, London Borough of Ealing. The school is incorporated as The Japanese School Limited (日本人学校有限会社 Nihonjin Gakkō Yūgen Kaisha?). The Japanese Saturday School in London (?), a Rondon Hoshū Jugyō KōJapanese supplementary school, is a part of the institution.
Junko Sakai (酒井 順子 Sakai Junko), author of Japanese Bankers in the City of London: Language, Culture and Identity in the Japanese Diaspora, described the school as one of the "geographical centres" of London's Japanese community.
In 1999 the Saturday school programme had three divisions: elementary school for ages 6–12, junior high school for ages 13–15, and senior high school, equivalent to the English sixth-form. The Saturday school uses three campuses: the Acton Campus (アクトン校舎 Akuton Kōsha), which uses the Japanese School in London building; the Brent Campus (ブレント校舎 Burento Kōsha), which uses the Whitefield School; and the Croydon Campus (クロイドン校舎 Kuroidon Kōsha), which uses the Croydon School for Girls.