2025 Japan Open Tennis Championships
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| 2025 Japan Open Tennis Championships | |
|---|---|
| Date | 24–30 September |
| Edition | 51st |
| Category | ATP 500 |
| Draw | 32S/16D |
| Surface | Hard / outdoor |
| Location | Tokyo, Japan |
| Venue | Ariake Coliseum |
| Champions | |
| Singles | |
 Carlos Alcaraz | |
| Doubles | |
 Hugo Nys /  Édouard Roger-Vasselin | |
The 2025 Kinoshita Group Japan Open was a men's tennis tournament played on outdoor hardcourts. It was the 51st edition of the Japan Open, and an ATP 500 tournament on the 2025 ATP Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from 24 to 30 September 2025.[1]
Singles
Carlos Alcaraz def. 
Taylor Fritz, 6–4, 6–4
Doubles
Hugo Nys / 
Édouard Roger-Vasselin def. 
Rohan Bopanna / 
Takeru Yuzuki, 7–5, 7–5
Singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| ESP |
Carlos Alcaraz | 1 | 1 |
 USA |
Taylor Fritz | 5 | 2 |
 DEN |
Holger Rune | 11 | 3 |
 NOR |
Casper Ruud | 12 | 4 |
 CZE |
Tomáš Macháč | 22 | 5 |
| FRA |
Ugo Humbert | 24 | 6 |
 CAN |
Denis Shapovalov | 26 | 7 |
| USA |
Frances Tiafoe | 29 | 8 |
- 1 Rankings are as of 15 September 2025.[2]
Other entrants
The following players received wildcards into the singles main draw:
The following player received entry using a protected ranking:
The following players received entry from the qualifying draw:
Withdrawals
Jack Draper → replaced by Marcos Giron
Jiří Lehečka → replaced by 
Daniel Altmaier
Alexei Popyrin → replaced by Jenson Brooksby- Ben Shelton → replaced by
Hamad Medjedovic
