Japan Open (tennis)

This article is about the men's ATP 500 tennis tournament. For the women's WTA 500 tennis tournament also held in Tokyo, see Pan Pacific Open. For the women's WTA 250 tennis tournament also held in Japan, in Osaka, see Japan Women's Open.
Not to be confused with All Japan Championships.
Kinoshita Group Japan Open
Tournament information
Founded1972 (1972)
LocationTokyo, Japan
VenueAriake Coliseum
Musashino Forest Sports Plaza (2018)
SurfaceHard / outdoors (1972, 1976–1977, 1982–2017, 2019–)
Clay / outdoors (1973–1975, 1978–1981)
Hard / indoors (2018)
Websitejapanopentennis.com
Current champions (2025)
Men's singles Carlos Alcaraz
Men's doubles Hugo Nys
Édouard Roger-Vasselin
ATP Tour
CategoryATP 500 (2009-present)/
ATP International Series Gold (2000–2008)/
ATP Championship Series
(1990–1999)
Grand Prix circuit
(1973–1989)
Draw32S / 24Q / 16D
Prize moneyUS$2,226,470 (2025), $2,046,340 (2019)
WTA Tour
CategoryTier III
Draw32M / 32Q / 16D
Prize moneyUS$175,000 (2008)

The Japan Open, currently sponsored by the 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.

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