O Japan Open, com o acréscimo eventual do nome de patrocinadores, é o nome comercial dos seguintes torneios de tênis:
ATP de Tóquio (atualmente: Rakuten Japan Open Tennis Championships)
WTA de Tóquio II: 1972–71 [S], 1974–1975, 1976 [S], 1981–1986, 1993–2000 (Japan Open); 1973 (Fred Perry Japan Open); 1979–1980 (Hit Union Japan Open); 1987–1992 (Suntory Japan Open); 2001–2009 (AIG Japan Open); 2015, 2017 (Japan Women's Open Tennis); 2016 (Hashimoto Sogyo Japan Women's Open Tennis).
WTA de Osaka: 2009–2013 (HP Japan Women's Open Tennis); 2014 (Japan Women's Open Tennis); 2023 (Kinoshita Group Japan Open Tennis Championships).
WTA de Hiroshima: 2018–2019 (Hana-cupid Japan Women's Open).
Categoria:Desambiguação Japan Open