Japan Open (tennis)

Kinoshita Group Japan Open
Tournament information
Founded1915 (1915)
LocationTokyo, Japan
VenueAriake Coliseum
Musashino Forest Sports Plaza (2018)
SurfaceHard / outdoors (1915–1972, 1976–1977, 1982–2017, 2019–)
Clay / outdoors (1973–1975, 1978–1981)
Hard / indoors (2018)
Websitejapanopentennis.com
Current champions (2024)
Men's singles Arthur Fils
Men's doubles Julian Cash
Lloyd Glasspool
ATP Tour
CategoryATP 500 series /
ATP International Series Gold /
ATP Championship Series
(1990–present)
Grand Prix circuit
(1973–1989)
Draw32S / 24Q / 16D
Prize moneyUS$2,046,340 (2019)
WTA Tour
CategoryTier III
Draw32M / 32Q / 16D
Prize moneyUS$175,000 (2008)

The Japan Open (currently sponsored by Kinoshita Group) is a men's tennis tournament held in Ariake Tennis Forest Park with its center court Ariake Coliseum, located in Koto, Tokyo. It has been held since 1972. In 2018, the venue switched to the Musashino Forest Sports Plaza as the Ariake Coliseum was renovated for the tennis events at the 2020 Summer Olympics. The championship includes men's singles and doubles competitions. The "All-Japan Championships" was founded in 1922 (there had been another Japanese championships held once in 1915). Before 1972, the All-Japan championships was an international event (although in many years there were few overseas competitors) but after the Japan Open began, the All-Japan championships became a national event.