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.

A Japanese championships was first held in 1915 when the British player G. A. Roper beat his compatriot H. C. M. Horne in the final in four sets. The event was held on the grounds of the Kobe Club in Mirume. The entries were few, as the native players of Tokyo and Yokohama wanted the meeting held in Tokyo, but that was impossible, as the Kobe club was the only club affiliated to the Lawn Tennis Association.

The All-Japan Championships was first played in 1922 in Tokyo (a few months after the Japanese Tennis Association was formed) as a men's only tournament. In 1924, a women's event was added to the programme. The tournament has been mainly played in Tokyo throughout its long run but has also been staged in other cities such as Osaka in 1933, 1935, 1937, 1939. Following World War II, the event was sometimes known as the Japan International Championships until 1972.

The Japan Open was first held in 1972 as a minor ATP event and from 1973 was part of the Grand Prix tennis tour. The Japan Open was known as the "Tokyo Outdoor Grand Prix" between 1973 and 1989. From 1990 it was part of the ATP Tour. From 1979 until 2008, the Japan Open was a joint tournament for both men and women. This is no longer the case in the aftermath of the Ariake Coliseum hosting another women's professional tournament, the Pan Pacific Open. On the women's side, the Japan Open was held until 2014 on the WTA Tour, and then it was downgraded to a $100,000+H ITF Women's Circuit event. In 2019, the women's event was discontinued. The men's event is part of the ATP Tour 500 series level of tournaments

The All-Japan championships continues to this day but is a national event for Japanese players only, whilst the Japan Open took over the mantle as the Japan international event from 1972 onwards.

Year	Champion	Runner-up	Score
1915	G.A. Roper	H.C.M. Horne	6–1, 7–5, 9–11, 6–4
↓  All-Japan Championships  ↓
1922	Masanosuke Fukuda	Yoshiro Ohta	6-2, 6-2, 7-5
1923	Takeichi Harada	Teizo Toba	5-7, 6-3, 5-7, 6-2, 6-2
1924	Tsumio Tawara	Ryuki Miki	2-6, 4-6, 7-5, 6-1, 8-6
1925	Tsumio Tawara	Ryuki Miki	6-4, 4-6, 4-6, 6-4, 7-5
1926	Yoshiro Ohta	Ryuki Miki	6-2, 6-4, 2-6, 6-4
1927	Tamio Abe	Koichiro Ishii	2-6, 7-5, 6-2, 8-6
1928	Hajime Makino	Jiro Sato	4-6, 7-5, 8-6, 6-0
1929	Takeichi Harada	Jiro Sato	6-3, 6-3, 6-2
1930	Jiro Sato	Hyotaro Sato	6-4, 8-6, 6-2
1931	Takeo Kuwabara	Eikichi Itoh	6-2, 6-4, 4-6, 6-3
1932	Ryosuke Nunoi	Jiro Sato	5-7, 6-2, 2-6, 6-4, 6-1
1933	Hideo Nishimura	Jiro Fujikura	6-1, 6-4, 3-6, 6-2
1934	Jiro Yamagishi	Hideo Nishimura	6-0, 6-3, 6-1
1935	Jiro Yamagishi	Roderich Menzel	7-5, 6-2, 6-2
1936	Jiro Yamagishi	Akimasa Miura	6-4, 4-6, 3-6, 7-5, 6-0
1937	Gottfried von Cramm	Jiro Yamagishi	7-9, 6-4, 6-4, 6-4
1938	Jiro Yamagishi	Tetsuo Takamuku	6-4, 6-3, 5-7, 6-2
1939	Franjo Punčec	Fumiteru Nakano	4-6, 6-2, 6-2, 6-3
1940	Haruo Kodera	Nakahara Shiken	6-8, 1-6, 6-2, 6-3, 6-4
1942	Tamotsu Washimi	Shin Tanabe	6-1, 6-0, 6-1
1946	Goro Fujikura	Michihiko Kawazoe	6-4, 3-6, 6-3, 6-3
1947	Fumiteru Nakano	Goro Fujikura	4-6, 3-6, 7-5, 6-4, 6-0
1948	Fumiteru Nakano	Goro Fujikura	6-4, 8-6, 6-3
1949	Jiro Kumamaru	Goro Fujikura	6-4, 6-2, 6-3
1950	Jiro Kumamaru	Goro Fujikura	6-0, 5-7, 6-4, 6-0
1951	Jiro Kumamaru	Art Larsen	6-4, 6-3, 6-1
1952	Jiro Kumamaru	Kosei Kamo	6-3, 6-4, 6-3
1953	Kosei Kamo	Kamo Aya Hitoshi	6-3, 6-2, 6-3
1954	Atsushi Miyagi	Kosei Kamo	4-6, 6-2, 6-3, 3-6, 6-3
1955	Atsushi Miyagi	Yoshio Yoshimura	6-1, 9-7, 11-9
1956	Kosei Kamo	Atsushi Miyagi	7-5, 6-0, 7-5
1957	Atsushi Miyagi	Yoshihisa Shibata	6-3, 6-1, 6-3
1958	Ham Richardson	Alex Olmedo	6-2, 6-1, 6-1
1959	Barry MacKay	Atsushi Miyagi	6-2, 6-3, 6-3
1960	Atsushi Miyagi	Takeo Hanna	6-4, 6-2, 2-6, 6-1
1961	Osamu Ishiguro	Isao Watanabe	6-4, 6-3, 6-1
1962	Ulf Schmidt	Osamu Ishiguro	6-4, 2-6, 3-6, 6-0, 6-4
1963	Osamu Ishiguro	Kose Kamo	6-4, 6-3, 6-1
1964	Koji Watanabe	Mitsuru Motoi	6-4, 2-6, 3-6, 6-0, 6-4
1965	Osamu Ishiguro
1966	Ichizo Konishi	Koji Watanabe
1967	Koji Watanabe	Keishiro Yanagi	5-7, 6-4, 6-0, 2-6, 6-4
1968	Koji Watanabe	Osamu Ishiguro	6–3, 6–4, 4–6, 6–4
1969	Isao Kobayashi	Ichizo Konishi	7–5, 8–6, 6–1
1970	Martin Mulligan	Jun Kuki	6–2, 6–3, 7–5
1971	Jun Kamiwazumi	Toshiro Sakai	6–4, 4–6, 6–4, 6–2
⬆ All-Japan Championships  ⬆
↓  Japan Open   ↓
1972	Toshiro Sakai	Jun Kuki	6–3, 6–3
↓  Grand Prix circuit  ↓
1973	Ken Rosewall	John Newcombe	6–1, 6–4
1974	John Newcombe	Ken Rosewall	3–6, 6–2, 6–3
1975	Raúl Ramírez	Manuel Orantes	6–4, 7–5, 6–3
1976	Roscoe Tanner	Corrado Barazzutti	6–3, 6–2
1977	Manuel Orantes	Kim Warwick	6–2, 6–1
1978	Adriano Panatta	Pat DuPré	6–3, 6–3
1979	Terry Moor	Pat DuPré	3–6, 7–6, 6–2
1980	Ivan Lendl	Eliot Teltscher	3–6, 6–4, 6–0
1981	Balázs Taróczy	Eliot Teltscher	6–3, 1–6, 7–6
1982	Jimmy Arias	Dominique Bedel	6–2, 2–6, 6–4
1983	Eliot Teltscher	Andrés Gómez	7–5, 3–6, 6–1
1984	David Pate	Terry Moor	6–3, 7–5
1985	Scott Davis	Jimmy Arias	6–1, 7–6
1986	Ramesh Krishnan	Johan Carlsson	6–3, 6–1
1987	Stefan Edberg	David Pate	7–6, 6–4
1988	John McEnroe	Stefan Edberg	6–2, 6–2
1989	Stefan Edberg (2)	Ivan Lendl	6–3, 2–6, 6–4
⬆ Grand Prix circuit  ⬆
↓  ATP Tour 500  ↓
1990	Stefan Edberg (3)	Aaron Krickstein	6–4, 7–5
1991	Stefan Edberg (4)	Ivan Lendl	6–1, 7–5, 6–0
1992	Jim Courier	Richard Krajicek	6–4, 6–4, 7–6
1993	Pete Sampras	Brad Gilbert	6–2, 6–2, 6–2
1994	Pete Sampras (2)	Michael Chang	6–4, 6–2
1995	Jim Courier (2)	Andre Agassi	6–3, 6–4
1996	Pete Sampras (3)	Richey Reneberg	6–4, 7–5
1997	Richard Krajicek	Lionel Roux	6–2, 3–6, 6–1
1998	Andrei Pavel	Byron Black	6–3, 6–4
1999	Nicolas Kiefer	Wayne Ferreira	7–6, 7–5
2000	Sjeng Schalken	Nicolás Lapentti	6–4, 3–6, 6–1
2001	Lleyton Hewitt	Michel Kratochvil	6–4, 6–2
2002	Kenneth Carlsen	Magnus Norman	7–6, 6–3
2003	Rainer Schüttler	Sébastien Grosjean	7–6), 6–2
2004	Jiří Novák	Taylor Dent	5–7, 6–1, 6–3
2005	Wesley Moodie	Mario Ančić	1–6, 7–6, 6–4
2006	Roger Federer	Tim Henman	6–3, 6–3
2007	David Ferrer	Richard Gasquet	6–1, 6–2
2008	Tomáš Berdych	Juan Martín del Potro	6–1, 6–4
2009	Jo-Wilfried Tsonga	Mikhail Youzhny	6–3, 6–3
2010	Rafael Nadal	Gaël Monfils	6–1, 7–5
2011	Andy Murray	Rafael Nadal	3–6, 6–2, 6–0
2012	Kei Nishikori	Milos Raonic	7–6, 3–6, 6–0
2013	Juan Martín del Potro	Milos Raonic	7–6, 7–5
2014	Kei Nishikori (2)	Milos Raonic	7–6, 4–6, 6–4
2015	Stan Wawrinka	Benoît Paire	6–2, 6–4
2016	Nick Kyrgios	David Goffin	4−6, 6−3, 7−5
2017	David Goffin	Adrian Mannarino	6−3, 7−5
2018	Daniil Medvedev	Kei Nishikori	6–2, 6–4
2019	Novak Djokovic	John Millman	6–3, 6–2
2020	No competition (due to COVID-19 pandemic)
2021
2022	Taylor Fritz	Frances Tiafoe	7–6, 7–6
2023	Ben Shelton	Aslan Karatsev	7–5, 6–1
2024	Arthur Fils	Ugo Humbert	5–7, 7–6, 6–3

Year	Champion	Runner-up	Score
↓  All-Japan Championships  ↓
1924	T. Kuroi
1925	T. Kuroi
1926	S. Hayama
1927	T. Moriwaki
1928	S. Toda
1929	R. Takiguchi
1930	T. Kobayishi
1931	T. Kobayishi
1932	K. Minami
1933	M. Hayashi
1934	M. Hayashi
1935	T. Nakano
1936	S. Toda
1937	Marie-Louise Horn
1938	T. Kizen
1939	J. Kamo
1940	S. Sawada
1942	M. Yamakawa
1946	Sachiko Kamo
1947	Sachiko Kamo
1948	Sachiko Kamo
1949	Sachiko Kamo
1950	Sachiko Kamo
1951	Sachiko Kamo
1952	Reiko Miyagi
1953	Sachiko Kamo
1954	Reiko Miyagi
1955	Sachiko Kamo
1956	Reiko Miyagi
1957	Reiko Miyagi
1958	Reiko Miyagi
1959	Reiko Miyagi
1960	Reiko Miyagi
1961	Reiko Miyagi
1962	Reiko Miyagi
1963	Reiko Miyagi
1964	H. Schretz
1965	Kazuko Kuramatsu
1966	Yohko Obata
1967	Kazuko Sawamatsu
1968	Kazuko Sawamatsu
1969	Kazuko Sawamatsu
1970	Kazuko Sawamatsu	Kathy Harter	6–3, 7–5.
1971	Kimiyo Hatanaka	Duk-Hee Lee	9–7, 4–6, 9–7
1972	Kazuko Sawamatsu	Alena Palmeová-West	6–3, 6–0
⬆ All-Japan Championships  ⬆
↓  Japan Open   ↓
1973	Evonne Goolagong	Helga Niessen Masthoff	6–3, 6–4
1974	Maria Bueno	Katja Ebbinghaus	3–6, 6–4, 6–3
1975	Kazuko Sawamatsu	Ann Kiyomura	6–2, 3–6, 6–1
1976	Wendy Turnbull	Michèle Gurdal	6–1, 6–1
1977	not held
1978	Ann Kiyomura	Sonoe Yonezawa	6–4, 6–2
1979	Betsy Nagelsen	Naoko Sato	6–1, 3–6, 6–3
1980	Mariana Simionescu	Nerida Gregory	6–4, 6–4
1981	Marie Pinterová	Pam Casale	2–6, 6–4, 6–1
1982	Laura Gildemeister	Pilar Vásquez	3–6, 6–4, 6–0
1983	Etsuko Inoue	Shelley Solomon	7–5, 6–2
1984	Lilian Drescher	Shawn Foltz	6–4, 6–2
1985	Gabriela Sabatini	Linda Gates	6–3, 6–4
1986	Helen Kelesi	Bettina Fulco-Villella	6–2, 6–2
1987	Katerina Maleeva	Barbara Gerken	6–2, 6–3
1988	Patty Fendick	Stephanie Rehe	6–3, 7–5
1989	Kumiko Okamoto	Elizabeth Smylie	6–4, 6–2
1990	Catarina Lindqvist	Elizabeth Smylie	6–3, 6–2
1991	Lori McNeil	Sabine Appelmans	2–6, 6–2, 6–1
1992	Kimiko Date	Sabine Appelmans	7–5, 3–6, 6–3
1993	Kimiko Date (2)	Stephanie Rottier	6–1, 6–3
1994	Kimiko Date (3)	Amy Frazier	7–5, 6–0
1995	Amy Frazier	Kimiko Date	7–6, 7–5
1996	Kimiko Date (4)	Amy Frazier	7–5, 6–4
1997	Ai Sugiyama	Amy Frazier	4–6, 6–4, 6–4
1998	Ai Sugiyama (2)	Corina Morariu	6–3, 6–3
1999	Amy Frazier (2)	Ai Sugiyama	6–2, 6–2
2000	Julie Halard-Decugis	Amy Frazier	5–7, 7–5, 6–4
2001	Monica Seles	Tamarine Tanasugarn	6–3, 6–2
2002	Jill Craybas	Silvija Talaja	2–6, 6–4, 6–4
2003	Maria Sharapova	Anikó Kapros	2–6, 6–2, 7–6
2004	Maria Sharapova (2)	Mashona Washington	6–0, 6–1
2005	Nicole Vaidišová	Tatiana Golovin	7–6, 3–2 ret.
2006	Marion Bartoli	Aiko Nakamura	2–6, 6–2, 6–2
2007	Virginie Razzano	Venus Williams	4–6, 7–6, 6–4
2008	Caroline Wozniacki	Kaia Kanepi	6–2, 3–6, 6–1
2009	see Japan Women's Open

Year	Champions	Runners-up	Score
↓  Grand Prix circuit  ↓
1973	Mal Anderson Ken Rosewall	Colin Dibley Allan Stone	7–5, 7–5
1974	not completed due to weather
1975	Brian Gottfried Raúl Ramírez	Juan Gisbert Sr. Manuel Orantes	7–6, 6–4
1976	Bob Carmichael Ken Rosewall	Ismail El Shafei Brian Fairlie	6–4, 6–4
1977	Geoff Masters Kim Warwick	Colin Dibley Chris Kachel	6–2, 7–6
1978	Ross Case Geoff Masters	Željko Franulović Buster Mottram	6–2, 4–6, 6–1
1979	Colin Dibley Pat DuPré	Rod Frawley Francisco González	3–6, 6–1, 6–1
1980	Ross Case Jaime Fillol	Terry Moor Eliot Teltscher	6–3, 3–6, 6–4
1981	Heinz Günthardt Balázs Taróczy	Larry Stefanki Robert Van't Hof	3–6, 6–2, 6–1
1982	Sherwood Stewart Ferdi Taygan	Tim Gullikson Tom Gullikson	6–1, 3–6, 7–6
1983	Sammy Giammalva Jr. Steve Meister	Tim Gullikson Tom Gullikson	6–4, 6–7, 7–6
1984	David Dowlen Nduka Odizor	Mark Dickson Steve Meister	6–7, 6–4, 6–3
1985	Scott Davis David Pate	Sammy Giammalva Jr. Greg Holmes	7–6, 6–7, 6–3
1986	Matt Anger Ken Flach	Jimmy Arias Greg Holmes	6–2, 6–3
1987	Paul Annacone Kevin Curren	Andrés Gómez Anders Järryd	6–4, 7–6
1988	John Fitzgerald Johan Kriek	Steve Denton David Pate	6–4, 6–7, 6–4
1989	Ken Flach Robert Seguso	Kevin Curren David Pate	7–6, 7–6
↓  ATP Tour 500  ↓
1990	Mark Kratzmann Wally Masur	Kent Kinnear Brad Pearce	3–6, 6–3, 6–4
1991	Stefan Edberg Todd Woodbridge	John Fitzgerald Anders Järryd	6–4, 5–7, 6–4
1992	Kelly Jones Rick Leach	John Fitzgerald Anders Järryd	0–6, 7–5, 6–3
1993	Ken Flach Rick Leach	Glenn Michibata David Pate	2–6, 6–3, 6–4
1994	Henrik Holm Anders Järryd	Sébastien Lareau Patrick McEnroe	7–5, 6–1
1995	Mark Knowles Jonathan Stark	John Fitzgerald Anders Järryd	6–3, 3–6, 7–6
1996	Todd Woodbridge Mark Woodforde	Mark Knowles Rick Leach	6–2, 6–3
1997	Martin Damm Daniel Vacek	Justin Gimelstob Patrick Rafter	2–6, 6–2, 7–6
1998	Sébastien Lareau Daniel Nestor	Olivier Delaître Stefano Pescosolido	6–3, 6–4
1999	Jeff Tarango Daniel Vacek	Wayne Black Brian MacPhie	4–3, ret.
2000	Mahesh Bhupathi Leander Paes	Michael Hill Jeff Tarango	6–4, 6–7, 6–3
2001	Rick Leach David Macpherson	Paul Hanley Nathan Healey	1–6, 7–6, 7–6
2002	Jeff Coetzee Chris Haggard	Jan-Michael Gambill Graydon Oliver	7–6, 6–4
2003	Justin Gimelstob Nicolas Kiefer	Scott Humphries Mark Merklein	6–7, 6–3, 7–6
2004	Jared Palmer Pavel Vízner	Jiří Novák Petr Pála	5–1, ret.
2005	Satoshi Iwabuchi Takao Suzuki	Simon Aspelin Todd Perry	5–4, 5–4
2006	Ashley Fisher Tripp Phillips	Paul Goldstein Jim Thomas	6–2, 7–5
2007	Jordan Kerr Robert Lindstedt	Frank Dancevic Stephen Huss	6–4, 6–4
2008	Mikhail Youzhny Mischa Zverev	Lukáš Dlouhý Leander Paes	6–3, 6–4
2009	Julian Knowle Jürgen Melzer	Ross Hutchins Jordan Kerr	6–2, 5–7, [10–8]
2010	Eric Butorac Jean-Julien Rojer	Andreas Seppi Dmitry Tursunov	6–3, 6–2
2011	Andy Murray Jamie Murray	František Čermák Filip Polášek	6–1, 6–4
2012	Alexander Peya Bruno Soares	Leander Paes Radek Štěpánek	6–3, 7–6
2013	Rohan Bopanna Édouard Roger-Vasselin	Jamie Murray John Peers	7–6, 6–4
2014	Pierre-Hugues Herbert Michał Przysiężny	Ivan Dodig Marcelo Melo	6–3, 6–7, [10–5]
2015	Raven Klaasen Marcelo Melo	Juan Sebastián Cabal Robert Farah	7–6, 3–6, [10–7]
2016	Marcel Granollers Marcin Matkowski	Raven Klaasen Rajeev Ram	6–2, 7–6
2017	Ben McLachlan Yasutaka Uchiyama	Jamie Murray Bruno Soares	6–4, 7–6
2018	Ben McLachlan Jan-Lennard Struff	Raven Klaasen Michael Venus	6–4, 7–5
2019	Nicolas Mahut Édouard Roger-Vasselin	Nikola Mektić Franko Škugor	7–6, 6–4
2020	no competition (due to COVID-19 pandemic)
2021
2022	Mackenzie McDonald Marcelo Melo	Rafael Matos David Vega Hernández	6–4, 3–6, [10–4]
2023	Rinky Hijikata Max Purcell	Jamie Murray Michael Venus	6–4, 6–1

Year	Champions	Runners-up	Score
1979– 1989	not available
1990	Kathy Jordan Elizabeth Smylie	Hu Na Michelle Jaggard	6–0, 3–6, 6–1
1991	Amy Frazier Maya Kidowaki	Yone Kamio Akiko Kijimuta	6–2, 6–4
1992	Amy Frazier Rika Hiraki	Kimiko Date Stephanie Rehe	5–7, 7–6, 6–0
1993	Ei Iida Maya Kidowaki	Li Fang Kyōko Nagatsuka	6–2, 4–6, 6–4
1994	Mami Donoshiro Ai Sugiyama	Yayuk Basuki Nana Miyagi	6–4, 6–1
1995	Miho Saeki Yuka Yoshida	Kyōko Nagatsuka Ai Sugiyama	6–7, 6–4, 7–6
1996	Kimiko Date Ai Sugiyama	Amy Frazier Kimberly Po	7–6, 6–7, 6–3
1997	Alexia Dechaume-Balleret Rika Hiraki	Kerry-Anne Guse Corina Morariu	6–4, 6–2
1998	Naoko Kijimuta Nana Miyagi	Amy Frazier Rika Hiraki	6–3, 4–6, 6–4
1999	Corina Morariu Kimberly Po	Catherine Barclay Kerry-Anne Guse	6–3, 6–2
2000	Julie Halard-Decugis Corina Morariu	Tina Križan Katarina Srebotnik	6–1, 6–2
2001	Liezel Huber Rachel McQuillan	Janet Lee Wynne Prakusya	6–2, 6–0
2002	Shinobu Asagoe Nana Miyagi	Svetlana Kuznetsova Arantxa Sánchez Vicario	6–4, 4–6, 6–4
2003	Maria Sharapova Tamarine Tanasugarn	Ansley Cargill Ashley Harkleroad	7–6, 6–0
2004	Shinobu Asagoe Katarina Srebotnik	Jennifer Hopkins Mashona Washington	6–1, 6–4
2005	Gisela Dulko Maria Kirilenko	Shinobu Asagoe María Vento-Kabchi	7–5, 4–6, 6–3
2006	Vania King Jelena Kostanić	Chan Yung-jan Chuang Chia-jung	7–6, 5–7, 6–2
2007	Sun Tiantian Yan Zi	Chuang Chia-jung Vania King	1–6, 6–2, [10–6]
2008	Jill Craybas Marina Erakovic	Ayumi Morita Aiko Nakamura	4–6, 7–5, [10–6]
2009	see Japan Women's Open

• Pan Pacific Open – women's tournament (since 1973)
• Japan Women's Open – women's tournament (since 2009)
• Category:National and multi-national tennis tournaments

• Official website
• Association of Tennis Professionals tournament profile

35°38′10″N 139°47′28″E / 35.636°N 139.791°E / 35.636; 139.791