Naomi Osaka: Japan’s Four-Time Grand Slam Champion
Naomi Osaka: Japan’s Four-Time Grand Slam Champion
Four majors and the first Asian world No. 1. Here is the career of Japan’s greatest tennis champion, Naomi Osaka.
Naomi Osaka is the most successful Japanese tennis player in history. A four-time Grand Slam singles champion and the first Asian player to be ranked world No. 1, she burst onto the scene by beating Serena Williams to win the 2018 US Open and went on to dominate hard-court majors. (Status as of June 2026.)
1. Four Grand Slams
A major specialist.
Osaka won the US Open in 2018 and 2020 and the Australian Open in 2019 and 2021 — the first Japanese player to win a major singles title, and one of only three players in the Open Era to win her first four Grand Slam finals.1
2. World No. 1
A historic first.
In January 2019 she became the first Asian player to reach world No. 1 in singles, spending 25 weeks at the top.1 ⚠ Current player; ranking and form change — check the latest.
3. A global icon
Beyond the court.
Osaka became one of the most recognisable athletes in the world, returning to the Tour in 2024 after maternity leave and winning again in 2025.1
4. Why she matters
Japan’s tennis trailblazer.
Osaka redefined what was possible for Japanese tennis — one of the country’s greatest athletes, alongside fellow trailblazer Kei Nishikori.
Frequently asked questions
How many Grand Slams has Naomi Osaka won?
Four — two US Opens (2018, 2020) and two Australian Opens (2019, 2021).
Was she the first Asian world No. 1?
Yes — she reached world No. 1 in singles in January 2019, the first Asian player to do so.
Who did she beat for her first major?
Serena Williams, in the 2018 US Open final.
Keep exploring
Explore the stories, systems and culture behind Japanese sport.
📅 更新履歴
| 日付 | 変更内容 |
|---|---|
| 2026年6月22日 | 初回公開 |
✅ ファクト再検証
最終検証日：2026年6月22日
SportsPulse 編集部が公開情報をもとに内容を確認しています。情報は確認時点のものです。最新情報は各公式サイトをご確認ください。