Japanin avoin tennisturnaus on lokakuussa Chōfussa, Tokiossa, Japanissa järjestettävä tennisturnaus. Turnaus järjestettiin ensimmäisen kerran vuonna 1972. Miesten turnaus kuuluu ATP World Tour 500 -sarjaan. Naisten turnaus järjestettiin viimeksi vuonna 2008.
Tulokset Miesten kaksinpeli VuosiVoittajaLoppuotteluvastustajaTulos1972 Toshiro Sakai Jun Kuki 6–3, 6–31973 Ken Rosewall John Newcombe 6–1, 6–41974 John Newcombe Ken Rosewall 3–6, 6–2, 6–31975 Raúl Ramírez Manuel Orantes 6–2, 5–7, 6–31976 Roscoe Tanner Corrado Barazzutti 6–3, 6–21977 Manuel Orantes Kim Warwick 6–2, 6–11978 Adriano Panatta Pat Du Pré 6–3, 6–31979 Terry Moor Pat Du Pré 3–6, 7–6, 6–21980 Ivan Lendl Eliot Teltscher 3–6, 6–4, 6–01981 Balázs Taróczy Eliot Teltscher 6–3, 1–6, 7–61982 Jimmy Arias Dominique Bedel 6–2, 2–6, 6–41983 Eliot Teltscher Andrés Gómez 7–5, 3–6, 6–11984 David Pate Terry Moor 6–3, 7–51985 Scott Davis Jimmy Arias 6–1, 7–61986 Ramesh Krishnan Johan Carlsson 6–3, 6–11987 Stefan Edberg David Pate 7–6, 6–41988 John McEnroe Stefan Edberg 6–2, 6–21989 Stefan Edberg Ivan Lendl 6–3, 2–6, 6–41990 Stefan Edberg Aaron Krickstein 6–4, 7–51991 Stefan Edberg Ivan Lendl 6–1, 7–5, 6–01992 Jim Courier Richard Krajicek 6–4, 6–4, 7–6(3)1993 Pete Sampras Brad Gilbert 6–2, 6–2, 6–21994 Pete Sampras Michael Chang 6–4, 6–21995 Jim Courier Andre Agassi 6–4, 6–31996 Pete Sampras Richey Reneberg 6–4, 7–51997 Richard Krajicek Lionel Roux 6–2, 3–6, 6–11998 Andrei Pavel Byron Black 6–3, 6–41999 Nicolas Kiefer Wayne Ferreira 7–6(5), 7–52000 Sjeng Schalken Nicolás Lapentti 6–4, 3–6, 6–12001 Lleyton Hewitt Michel Kratochvil 6–4, 6–22002 Kenneth Carlsen Magnus Norman 7–6(6), 6–32003 Rainer Schüttler Sébastien Grosjean 7–6(5), 6–22004 Jiří Novák Taylor Dent 5–7, 6–1, 6–32005 Wesley Moodie Mario Ančić 1–6, 7–6(7), 6–42006 Roger Federer Tim Henman 6–3, 6–3 2007 David Ferrer Richard Gasquet 6–1, 6–22008 Tomáš Berdych Juan Martín del Potro 6–1, 6–42009 Jo-Wilfried Tsonga Mihail Južnyi 6–3, 6–32010 Rafael Nadal Gaël Monfils 6–1, 7–52011 Andy Murray Rafael Nadal 3–6, 6–2, 6–02012 Kei Nishikori Milos Raonic 7–6(5), 3–6, 6–02013 Juan Martín del Potro Milos Raonic 7–6(5), 7–5 2014 Kei Nishikori Milos Raonic 7–6(5), 4–6, 6–4 2015 Stanislas Wawrinka Benoît Paire 6–2, 6–42016 Nick Kyrgios David Goffin 4–6, 6–3, 7–52017 David Goffin Adrian Mannarino 6−3, 7−52018 Daniil Medvedev Kei Nishikori 6−2, 6−4
Miesten nelinpeli VuosiVoittajatLoppuotteluvastustajatTulos1972 Dick Dell Sherwood Stewart || Marcello Lara Jeff Simpson||6–3, 6–2 |- |1973 || Malcolm Anderson Ken Rosewall Colin Dibley Allan Stone7–5, 7–51974 peruttiin sateen vuoksi1975 Brian Gottfried Raúl Ramírez || Juan Gisbert Manuel Orantes||7–6, 6–4 |- |1976 || Bob Carmichael Ken Rosewall Ismail El Shafei Brian Fairlie6–4, 6–41977 Geoff Masters Kim Warwick || Colin Dibley Chris Kachel||6–2, 7–6 |- |1978 || Ross Case Geoff Masters Željko Franulović Buster Mottram6–2, 4–6, 6–11979 Colin Dibley Pat Du Pré || Rod Frawley Francisco González||3–6, 6–1, 6–1 |- |1980 || Ross Case Jaime Fillol Terry Moor Eliot Teltscher6–3, 3–6, 6–41981 Heinz Günthardt Balázs Taróczy || Larry Stefanki Robert Van’t Hof||3–6, 6–2, 6–1 |- |1982 || Sherwood Stewart Ferdi Taygan Tim Gullikson Tom Gullikson6–1, 3–6, 7–61983 Sammy Giammalva Steve Meister || Tim Gullikson Tom Gullikson||6–4, 6–7, 7–6 |- |1984 || David Dowlen Nduka Odizor Mark Dickson Steve Meister6–7, 6–4, 6–31985 Scott Davis David Pate || Sammy Giammalva Greg Holmes||7–6, 6–7, 6–3 |- |1986 || Matt Anger Ken Flach Jimmy Arias Greg Holmes6–2, 6–31987 Paul Annacone Kevin Curren || Andrés Gómez Anders Järryd||6–4, 7–6 |- |1988 || John Fitzgerald Johan Kriek Steve Denton David Pate6–4, 6–7, 6–41989 Ken Flach Robert Seguso || Kevin Curren David Pate||7–6, 7–6 |- |1990 || Mark Kratzmann Wally Masur Kent Kinnear Brad Pearce3–6, 6–3, 6–41991 Stefan Edberg Todd Woodbridge || John Fitzgerald Anders Järryd||6–4, 5–7, 6–4 |- |1992 || Kelly Jones Rick Leach John Fitzgerald Anders Järryd0–6, 7–5, 6–31993 Ken Flach Rick Leach || Glenn Michibata David Pate||2–6, 6–3, 6–4 |- |1994 || Henrik Holm Anders Järryd Sébastien Lareau Patrick McEnroe7–5, 6–11995 Mark Knowles Jonathan Stark || John Fitzgerald Anders Järryd||6–3, 3–6, 7–6 |- |1996 || Todd Woodbridge Mark Woodforde Mark Knowles Rick Leach6–2, 6–31997 Martin Damm Daniel Vacek || Justin Gimelstob Patrick Rafter||2–6, 6–2, 7–6 |- |1998 || Sébastien Lareau Daniel Nestor Olivier Delaître Stefano Pescosolido6–3, 6–41999 Jeff Tarango Daniel Vacek || Wayne Black Brian MacPhie||4–3, luov. |- |2000 || Mahesh Bhupathi Leander Paes Michael Hill Jeff Tarango6–4, 6–7(1), 6–32001 Rick Leach David Macpherson || Paul Hanley Nathan Healey||1–6, 7–6(6), 7–6(4) |- |2002 || Jeff Coetzee Chris Haggard Jan-Michael Gambill Graydon Oliver7–6(4), 6–42003 Justin Gimelstob Nicolas Kiefer || Scott Humphries Mark Merklein||6–7(6), 6–3, 7–6(4) |- |2004 || Jared Palmer Pavel Vízner Jiří Novák Petr Pála5–1, luov.2005 Satoshi Iwabuchi Takao Suzuki || Simon Aspelin Todd Perry||5–4(3), 5–4(13) |- |2006 || Ashley Fisher Tripp Phillips Paul Goldstein Jim Thomas6–2, 7–52007 Jordan Kerr Robert Lindstedt || Frank Dancevic Stephen Huss||6–4, 6–4 |- |2008 || Mihail Južnyi Mischa Zverev Lukáš Dlouhý Leander Paes6–3, 6–42009 Julian Knowle Jürgen Melzer || Ross Hutchins Jordan Kerr||6–2, 5–7, [10–8] |- |2010 || Eric Butorac Jean-Julien Rojer Andreas Seppi Dmitri Tursunov 6–3, 6–22011 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(5)2013 Rohan Bopanna Édouard Roger-Vasselin || Jamie Murray John Peers || 7–6(5), 6–4 |- |2014 || Pierre-Hugues Herbert Michał Przysiężny Ivan Dodig Marcelo Melo 6–3, 6–7(3), [10–5] 2015 Raven Klaasen Marcelo Melo || Juan Sebastián Cabal Robert Farah Maksoud || 7–6(5), 3–6, [10–7] |- | 2016 || Marcel Granollers Marcin Matkowski Raven Klaasen Rajeev Ram 6–2, 7–6(4) 2017 Ben McLachlan Yasutaka Uchiyama || Jamie Murray Bruno Soares || 6–4, 7–6(1) |- | 2018 || Ben McLachlan Jan-Lennard Struff Raven Klaasen Michael Venus 6–4, 7–5
Naisten kaksinpeli VuosiVoittajaLoppuotteluvastustajaTulos1979 Betsy Nagelsen Naoko Satō 6–1, 3–6, 6–31980 Mariana Simionescu Nerida Gregory 6–4, 6–41981 Marie Neumanova Pam Casale 2–6, 6–4, 6–11982 Laura Arraya Pilar Vásquez 3–6, 6–4, 6–01983 Etsuko Inoue Shelley Solomon 7–5, 6–11984 Lilian Drescher Shawn Foltz 6–4, 6–21985 Gabriela Sabatini Linda Gates 6–3, 6–41986 Helen Kelesi Bettina Fulco 6–2, 6–21987 Katerina Maleeva Barbara Gerken 6–2, 6–31988 Patty Fendick Stephanie Rehe 6–3, 7–51989 Kumiko Okamoto Elizabeth Smylie 6–4, 6–21990 Catarina Lindqvist Elizabeth Smylie 6–3, 6–21991 Lori McNeil Sabine Appelmans 2–6, 6–2, 6–11992 Kimiko Date Sabine Appelmans 7–5, 3–6, 6–31993 Kimiko Date Stephanie Rottier 6–1, 6–31994 Kimiko Date Amy Frazier 7–5, 6–01995 Amy Frazier Kimiko Date 7–6, 7–51996 Kimiko Date Amy Frazier 7–5, 6–41997 Ai Sugiyama Amy Frazier 4–6, 6–4, 6–41998 Ai Sugiyama Corina Morariu 6–3, 6–31999 Amy Frazier Ai Sugiyama 6–2, 6–2 2000 Julie Halard-Decugis Amy Frazier 5–7, 7–5, 6–42001 Monica Seles Tamarine Tanasugarn 6–3, 6–2 2002 Jill Craybas Silvija Talaja 2–6, 6–4, 6–42003 Marija Šarapova Anikó Kapros 2–6, 6–2, 7–6(5)2004 Marija Šarapova Mashona Washington 6–0, 6–12005 Nicole Vaidišová Tatiana Golovin 7–6(4), 3–2, luov. 2006 Marion Bartoli Aiko Nakamura 2–6, 6–2, 6–22007 Virginie Razzano Venus Williams 4–6, 7–6(7), 6–42008 Caroline Wozniacki Kaia Kanepi 6–2, 3–6, 6–1
Naisten nelinpeli VuosiVoittajatLoppuotteluvastustajatTulos1979 Penny Johnson Betsy Nagelsen || Chen Chuan Yu Li-Qiao || 3–6, 6–4, 7–6 |- |1980 || Dana Gilbert Peanut Louie Nerida Gregory Marie Neumanova 7–5, 7–61981 Pat Medrado Cláudia Monteiro || Barbara Jordan Roberta McCallum || 6–3, 3–6, 6–2 |- |1982 || Laura duPont Barbara Jordan Brenda Remilton Naoko Satō 6–2, 6–7, 6–11983 Chris O’Neil Pam Whytcross || Helena Manset Micki Schillig || 6–3, 7–5 |- |1984 || Betsy Nagelsen Candy Reynolds Emilse Raponi Adriana Villagrán 6–3, 6–21985 Belinda Cordwell Julie Richardson || Laura Gildemeister Beth Herr || 6–4, 6–4 |- |1986 || Sandy Collins Sharon Walsh-Pete Susan Mascarin Betsy Nagelsen 6–1, 6–21987 Kathy Jordan Betsy Nagelsen || Sandy Collins Sharon Walsh-Pete || 6–3, 7–5 |- |1988 || Gigi Fernández Robin White Lea Antonoplis Barbara Gerken 6–1, 6–41989 Jill Hetherington Elizabeth Smylie || Ann Henricksson Beth Herr || 6–1, 6–3 |- |1990 || Kathy Jordan Elizabeth Smylie Hu Na Michelle Jaggard 6–0, 3–6, 6–11991 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, 6–01993 Ei Iida Maya Kidowaki || Li Fang Kyoko Nagatsuka || 6–2, 4–6, 6–4 |- |1994 || Mami Donoshiro Ai Sugiyama Yayuk Basuki Nana Miyagi 6–4, 6–11995 Miho Saeki Yuka Yoshida || Kyoko Nagatsuka Ai Sugiyama || 6–7, 6–4, 7–6 |- |1996 || Kimiko Date Ai Sugiyama Amy Frazier Kimberly Po 7–6, 6–7, 6–31997 Alexia Dechaume Rika Hiraki || Kerry-Anne Guse Corina Morariu || 6–4, 6–2 |- |1998 || Naoko Kijimuta Nana Miyagi Amy Frazier Rika Hiraki 6–3, 4–6, 6–41999 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, 6–22001 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, 6–42003 Marija Šarapova Tamarine Tanasugarn || Ansley Cargill Ashley Harkleroad || 7–6(1), 6–0 |- |2004 || Shinobu Asagoe Katarina Srebotnik Jennifer Hopkins Mashona Washington 6–1, 6–42005 Gisela Dulko Marija 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(2), 5–7, 6–22007 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]
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