Most Titles
Open Era singles titles.
- 1 Samantha Stosur 3 titles2009, 2013, 2014
- 2 Ai Sugiyama 2 titles1997, 1998
- 2 Amy Frazier 2 titles1995, 1999
Japan Women's Open tournament history
Current official name Kinoshita Group Japan Open Tennis Championships
The Japan Women's Open is a hard-court WTA tournament in Osaka.
Explore Japan Women's Open champions and finals from 1970 to 2025. Open an edition for its draw and match results, or compare the title leaders below.
Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Mapping details.
Record Book
Career Leaders
Most Finals
Champion or runner-up finishes.
- 1 Amy Frazier 4 finals
- 1 Kimiko Date 4 finals
- 1 Samantha Stosur 4 finals
- 2 Ai Sugiyama 3 finals
- 3 Zarina Diyas 2 finals
Most Match Wins
Recorded main-draw match wins.
- 1 Samantha Stosur 24 wins
- 2 Ai Sugiyama 21 wins
- 2 Amy Frazier 21 wins
- 2 Kimiko Date 21 wins
- 3 Zarina Diyas 12 wins
Most Appearances
Editions with a recorded main-draw match.
- 1 Kimiko Date 11 appearances
- 2 Misaki Doi 10 appearances
- 3 Kurumi Nara 9 appearances
- 4 Ai Sugiyama 8 appearances
- 5 Christina Mchale 7 appearances
Champion Records
Youngest & Oldest Champions
Age at the start of the tournament.
- Ashlyn Krueger 19.3 yearsYoungest · 2023
- Tamarine Tanasugarn 33.4 yearsOldest · 2010
Lowest-Ranked Champion
Entering singles ranking.
- 1 Suzan Lamens No. 1252024
Most Consecutive Titles
Titles in consecutive held editions.
- 1 Ai Sugiyama 2 consecutive titles1997–1998
- 1 Samantha Stosur 2 consecutive titles2013–2014
Longest Title Span
Years between a player's first and last title.
- 1 Samantha Stosur 5 years2009–2014
Open Era main-draw singles records from 1968 onward. Ranking records begin where reliable entering rankings are available.
Upcoming Edition
| Season | Tournament | Status | Dates | Category | Surface |
|---|---|---|---|---|---|
| 2026 | Japan Women's Open | Scheduled | Oct 19–25, 2026 | WTA 250 | Hard |
This scheduled edition has no recorded final yet. Open it for dates, draw information, and available results.
Tournament Outcomes by Season
| Season | Winner | Score | Runner-up | H2H | Match Data | Category | Surface |
|---|---|---|---|---|---|---|---|
| 2025 | Leylah Fernandez | 6-0 5-7 6-3 | Tereza Valentova | H2H | Match data | WTA 250 | Hard |
| 2024 | Suzan Lamens | 6-0 6-4 | Kimberly Birrell | H2H | Match data | WTA 250 | Hard |
| 2023 | Ashlyn Krueger | 6-3 7-6(6) | Lin Zhu | H2H | Match data | WTA 250 | Hard |
| 2020 | No champion | Cancelled | — | — | WTA 250 | Hard | |
| 2018 | Su-Wei Hsieh | 6-2 6-2 | Amanda Anisimova | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2017 | Zarina Diyas | 6-2 7-5 | Miyu Kato | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2016 | Christina Mchale | 3-6 6-4 6-4 | Katerina Siniakova | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2015 | Yanina Wickmayer | 4-6 6-3 6-3 | Magda Linette | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2014 | Samantha Stosur | 7-6(7) 6-3 | Zarina Diyas | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2013 | Samantha Stosur | 3-6 7-5 6-2 | Eugenie Bouchard | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2012 | Heather Watson | 7-5 5-7 7-6(4) | Kai-Chen Chang | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2011 | Marion Bartoli | 6-3 6-1 | Samantha Stosur | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2010 | Tamarine Tanasugarn | 7-5 6-7(4) 6-1 | Kimiko Date | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 2009 | Samantha Stosur | 7-5 6-1 | Francesca Schiavone | H2H | Match data | International → modern equivalent WTA 250 | Hard |
| 1999 | Amy Frazier | 6-2 6-2 | Ai Sugiyama | H2H | Match data | Tier III → modern equivalent WTA 250 | Hard |
| 1998 | Ai Sugiyama | 6-3 6-3 | Corina Morariu | H2H | Match data | Tier III → modern equivalent WTA 250 | Hard |
| 1997 | Ai Sugiyama | 4-6 6-4 6-4 | Amy Frazier | H2H | Match data | Tier III → modern equivalent WTA 250 | Hard |
| 1996 | Kimiko Date | 7-5 6-4 | Amy Frazier | H2H | Match data | Tier III → modern equivalent WTA 250 | Hard |
| 1995 | Amy Frazier | 7-6 7-5 | Kimiko Date | H2H | Match data | Tier III → modern equivalent WTA 250 | Hard |
| 1994 | Manuela Maleeva Fragniere | 6-1 4-6 7-5 | Iva Majoli | H2H | Match data | Tier III → modern equivalent WTA 250 | Carpet |
| 1993 | Jana Novotna | 6-3 6-2 | Kimiko Date | H2H | Match data | Tier III → modern equivalent WTA 250 | Carpet |
| 1992 | Helena Sukova | 6-2 4-6 6-1 | Laura Arraya | H2H | Match data | Tier IV → modern equivalent WTA 250 | Carpet |
| 1970 | Kazuko Sawamatsu | 6-3 7-5 | Kathleen Harter | H2H | Match data | WTA 250 | — |
Frequently Asked Questions
- Where is Japan Women's Open held?
- Japan Women's Open is held in Osaka, Japan.
- Who is the latest recorded Japan Women's Open winner?
- The 2025 Japan Women's Open was won by Leylah Fernandez, who defeated Tereza Valentova 6-0 5-7 6-3.
- Who has won the most Japan Women's Open titles?
- Samantha Stosur has won 3 Japan Women's Open titles, the most by any player.
- What is the earliest recorded Japan Women's Open edition?
- The earliest recorded edition of Japan Women's Open in TennisDB is 1970.
- What surface is Japan Women's Open played on?
- Japan Women's Open is played on hard courts.