Japan Women’s Open

2009: A new chapter begins

The 2009 edition marked the beginning of the tournament’s women’s-only format. Staged from 12 to 18 October, the competition took place in Osaka on hard courts. Australia’s Samantha Stosur won the singles title, defeating the field to establish herself as the inaugural champion of this version of the event.

Stosur would become one of the tournament’s most notable champions. Her powerful serve and aggressive forehand suited hard-court tennis, while her experience on the international circuit helped her navigate the demands of a week-long competition. Her victory in 2009 began a connection with the Japan Women’s Open that would become even more significant in subsequent years.

The tournament also featured a doubles competition, demonstrating from the outset that the event was about more than individual championship runs. Doubles has remained an important part of its programme, giving specialist teams and established singles players another opportunity to compete for a title.

2010–2014: Samantha Stosur makes history

The early years of the Japan Women’s Open produced a varied list of singles champions. Tamarine Tanasugarn of Thailand won the title in 2010, followed by France’s Marion Bartoli in 2011. Britain’s Heather Watson claimed the championship in 2012, adding an important international title to her growing professional career.

In 2013, Samantha Stosur returned to the winner’s circle, defeating Eugenie Bouchard in the final. The Australian then won the tournament again in 2014, beating Zarina Diyas of Kazakhstan in the championship match. Those victories made Stosur a particularly important figure in the event’s early history.

Her three singles titles in 2009, 2013 and 2014 established a record of success across different editions. Rather than dominating in consecutive years, Stosur demonstrated that returning to a familiar tournament and adapting to its conditions could pay dividends over time. In tennis terms, she clearly liked the local conditions rather a lot.

The champions from this period also demonstrated the tournament’s international reach. Players from Australia, Thailand, France, Britain and Kazakhstan all featured prominently, underlining the Japan Women’s Open’s role in bringing a diverse range of competitors to Japanese courts.

2015–2018: New champions and a change of location

The next stage of the tournament’s history brought further changes. Belgium’s Yanina Wickmayer won the singles title in 2015, defeating Poland’s Magda Linette in the final. American Christina McHale followed in 2016, beating Czech player Katerina Siniakova in a three-set championship match.

In 2017, the tournament was held in Tokyo, where Kazakhstan’s Zarina Diyas won the singles championship by defeating Japan’s Miyu Kato. The event then moved to Hiroshima for the 2018 edition, which produced another memorable champion: Taiwan’s Hsieh Su-wei.

Hsieh defeated American teenager Amanda Anisimova in the 2018 final. The result highlighted the variety of playing styles that could succeed at the Japan Women’s Open. Hsieh was renowned for her unusual shot selection, changes of pace and ability to disrupt opponents’ rhythm, qualities that made her a fascinating competitor on the professional circuit.

These years demonstrated that the tournament’s identity was not tied exclusively to one Japanese city. Its presence in Tokyo and Hiroshima expanded its geographical footprint, while its international champions continued to attract attention from tennis fans following the wider WTA Tour.

2019: Nao Hibino delivers a home victory

The 2019 Japan Women’s Open took place in Hiroshima from 9 to 15 September. Japan’s Nao Hibino won the singles title, defeating compatriot Misaki Doi 6–3, 6–2 in an all-Japanese final.

The result was particularly significant because it ensured the championship stayed in Japan. Hibino’s victory gave local supporters a home-grown champion and demonstrated the depth of Japanese talent competing on the professional women’s circuit.

An all-Japanese final also provided a compelling domestic storyline within an international tournament. Rather than seeing a local player challenge a visiting favourite, spectators witnessed two Japanese professionals competing for the same trophy. Hibino’s relatively comfortable straight-sets win secured her place in the event’s history.

2020–2022: A break in the tournament’s history

The Japan Women’s Open did not take place during the 2020 and 2021 seasons. The global COVID-19 pandemic disrupted international sport, leading to widespread cancellations, restrictions and changes to tennis schedules. International travel and tournament organisation became considerably more complicated, affecting events around the world.

The tournament also did not return in 2022. Consequently, there was no singles champion for any of these three editions. The interruption created a gap in the competition’s history and meant that players and fans had to wait longer for its return.

Professional tennis depends on international travel, tournament infrastructure and the ability to bring players, officials and spectators together. The disruption of these years illustrated how vulnerable even established sporting events can be when wider circumstances make normal competition impossible.

2023: The Japan Open returns to Osaka

The tournament returned in 2023, taking place in Osaka from 11 to 17 September as a WTA 250 event. Its comeback restored an important fixture to the Japanese women’s tennis calendar after a three-year absence.

American player Ashlyn Krueger won the singles championship, defeating China’s Zhu Lin 6–3, 7–6(8–6) in the final. The second-set tie-break provided a tense finish, with Krueger successfully closing out the match without needing a deciding set.

The 2023 tournament was significant for more than its champion. Its return to Osaka established a renewed foundation for the competition, while its WTA 250 status provided players with valuable ranking points and a recognised place on the professional tour.

The event also brought together singles and doubles competitions, reinforcing its role as a broader showcase for women’s professional tennis. After the interruption of the preceding years, the return of the Japan Open offered a welcome reminder that sporting traditions can survive periods of uncertainty.

2024: Suzan Lamens claims the title

The 2024 edition took place in Osaka from 14 to 20 October. Dutch player Suzan Lamens won the singles championship, defeating Australia’s Kimberly Birrell 6–0, 6–4 in the final.

The opening set was particularly emphatic, with Lamens winning every game. Birrell responded with greater resistance in the second set, but Lamens maintained her advantage to complete the victory in straight sets.

For Lamens, the triumph was an important career milestone. It demonstrated the opportunities available at WTA 250 events, where players can turn a strong week into a major professional achievement. Her victory also continued the tournament’s tradition of producing champions from a range of tennis nations.

The doubles title went to the partnership of Ena Shibahara and Laura Siegemund, who defeated Cristina Bucsa and Monica Niculescu in the final. Their 3–6, 6–2, 10–2 victory featured a reversal in momentum before they dominated the deciding match tie-break.

2025: Leylah Fernandez wins a dramatic final

The Kinoshita Group Japan Open returned to Osaka from 13 to 19 October 2025. Canada’s Leylah Fernandez won the singles title, defeating Czech qualifier Tereza Valentova 6–0, 5–7, 6–3 in the final.

Fernandez began the match in commanding fashion, taking the opening set without dropping a game. Valentova fought back in the second set, forcing a decider and demonstrating the determination that had carried her through qualifying and into the final. Fernandez regained control in the third set to secure the championship.

The result was particularly memorable because it brought Fernandez her first title of the 2025 season. It also highlighted the tournament’s ability to produce engaging stories involving both established tour players and emerging talent. Valentova’s run from qualifying to the final was an achievement in its own right, even though she narrowly missed out on the trophy.

In doubles, Kristina Mladenovic and Taylor Townsend won the championship, adding another international partnership to the tournament’s list of title holders. The 2025 edition further strengthened the Japan Open’s place on the late-season tennis calendar.

2026 and the tournament’s continuing legacy

The Kinoshita Group Japan Open is scheduled to return to Osaka from 19 to 25 October 2026, with matches taking place on outdoor hard courts at Morita Tennis Center Utsubo. The event remains part of the WTA 250 circuit, with a 32-player singles main draw and a 16-team doubles draw.

Its history, from the women’s-only format introduced in 2009 to the modern tournament in Osaka, reflects a competition that has continued to evolve. Samantha Stosur’s multiple championships, Nao Hibino’s home victory, Ashlyn Krueger’s comeback-era title, Suzan Lamens’ breakthrough and Leylah Fernandez’s dramatic 2025 triumph all form part of its sporting identity.

As the tournament moves forward, its appeal rests on the same ingredients that have sustained it for years: international competition, opportunities for emerging players, valuable ranking points and the possibility of an unexpected champion. The WTA Japan Open may not have the scale of a Grand Slam, but it has something every tennis tournament needs: a trophy, a competitive draw and absolutely no guarantee that the favourite will have a relaxing week.