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
2024 Champions
Women's singles
Aliona Falei
Champions
Men's singles
Rei Sakamoto
Men's doubles
Neil Oberleitner / Michael Vrbenský
Women's doubles
Dang Yiming / You Xiaodi
←  2024  · Keio Challenger ·  2026  →

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:

• Kaylan Bigun

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:

• Darya Astakhova

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

Main article: 2025 Keio Challenger – Men's singles

• Rei Sakamoto def. Kaichi Uchida 4–6, 7–6^(7–4), 6–4.

Women's singles

• Zhang Shuai vs. Ku Yeon-woo

Men's doubles

Main article: 2025 Keio Challenger – 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

1. "Rankings | Singles | ATP Tour | Tennis". ATP Tour.
2. "Rankings | Singles | WTA Tour | Tennis". WTA Tour.