2025 Keio Challenger
| 2025 Keio Challenger | |
|---|---|
| Date | 17 – 23 November (men's) 24 – 30 November (women's) |
| Edition | 18th (men's) 8th (women's) |
| Category | ATP Challenger Tour ITF Women's World Tennis Tour |
| Surface | Hard |
| Location | Yokohama, Japan |
| Champions | |
| Men's singles | |
 Rei Sakamoto | |
| Women's singles | |
 Zhang Shuai | |
| Men's doubles | |
 Neil Oberleitner /  Michael Vrbenský | |
| Women's doubles | |
| Dang Yiming / You Xiaodi | |
The 2025 Yokohama Keio Challenger was a professional tennis tournament played on hardcourts. It was the 18th (men's) and 8th (women's) editions of the tournament and part of the 2025 ATP Challenger Tour and the 2025 ITF Women's World Tennis Tour. It took place in Yokohama, Japan between 17 and 30 November 2025.
Men's singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| JPN
|
Kei Nishikori | 159 | 1 |
| JPN
|
Rei Sakamoto | 180 | 2 |
 SWE
|
Elias Ymer | 191 | 3 |
 GBR
|
Oliver Crawford | 193 | 4 |
 TPE
|
Hsu Yu-hsiou | 220 | 5 |
| JPN
|
Yuta Shimizu | 249 | 6 |
| JPN
|
Yasutaka Uchiyama | 305 | 7 |
| JPN
|
Kaichi Uchida | 309 | 8 |
- 1 Rankings are as of 10 November 2025.[1]
Other entrants
The following players received wildcards into the singles main draw:
- Masamichi Imamura
- Lennon Roark Jones
- Ryo Tabata
The following player received entry into the singles main draw through the Junior Accelerator programme:
The following players received entry from the qualifying draw:
- Taisei Ichikawa
- Yusuke Kusuhara
Igor Marcondes- Ryotaro Taguchi
- Michael Vrbenský
- Jumpei Yamasaki
Women's singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| CHN
|
Zhang Shuai | 102 | 1 |
 THA
|
Mananchaya Sawangkaew | 222 | 2 |
| CHN
|
Ma Yexin | 227 | 3 |
 USA
|
Hina Inoue | 232 | 4 |
 KOR
|
Ku Yeon-woo | 255 | 5 |
| USA
|
Hanna Chang | 273 | 6 |
| JPN
|
Haruka Kaji | 277 | 7 |
| CHN
|
You Xiaodi | 290 | 8 |
- 1 Rankings are as of 17 November 2025.[2]
Other entrants
The following players received wildcards into the singles main draw:
- Yuno Kitahara
- Anri Nagata
- Yuka Naito
- Naho Sato
The following player received entry into the singles main draw using a special ranking:
The following players received entry from the qualifying draw:
- Mayuka Aikawa
- Ena Koike
Jana Kolodynska- Rinko Matsuda
- Kristiana Sidorova
- Wang Yuhan
Cody Wong- Zhang Ying
Champions
Men's singles
- Rei Sakamoto def. Kaichi Uchida 4–6, 7–6(7–4), 6–4.
Women's singles
- Zhang Shuai def. Ku Yeon-woo 6–3, 6–2.
Men's doubles
- Neil Oberleitner / Michael Vrbenský def. Masamichi Imamura / Ryuki Matsuda 7–6(8–6), 6–1.
Women's doubles
- Dang Yiming / You Xiaodi def. Natsumi Kawaguchi / Hayu Kinoshita 2–6, 6–3, [10–4].
References
- ^ "Rankings | Singles | ATP Tour | Tennis". ATP Tour.
- ^ "Rankings | Singles | WTA Tour | Tennis". WTA Tour.