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 SeedKei Nishikori1591Rei Sakamoto1802Elias Ymer1913Oliver Crawford1934Hsu Yu-hsiou2205Yuta Shimizu2496Yasutaka Uchiyama3057Kaichi Uchida3098 1 Rankings are as of 10 November 2025.
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 SeedZhang Shuai1021Mananchaya Sawangkaew2222Ma Yexin2273Hina Inoue2324Ku Yeon-woo2555Hanna Chang2736Haruka Kaji2777You Xiaodi2908 1 Rankings are as of 17 November 2025.
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
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