2022 Keio Challenger

The 2022 Keio Challenger was a professional tennis tournament played on hard courts. It was the 15th (men's) and 5th (women's) editions of the tournament and part of the 2022 ATP Challenger Tour and the 2022 ITF Women's World Tennis Tour. It took place in Yokohama, Japan between 31 October and 13 November 2022.

Seeds

 * 1 Rankings are as of 24 October 2022.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇯🇵 Tomoya Fujiwara
 * 🇯🇵 Shinji Hazawa
 * 🇯🇵 Masamichi Imamura

The following players received entry into the singles main draw using protected rankings:
 * 🇯🇵 Tatsuma Ito
 * 🇯🇵 Yūichi Sugita

The following players received entry from the qualifying draw:
 * 🇰🇷 Hong Seong-chan
 * 🇯🇵 Taisei Ichikawa
 * 🇯🇵 Yuki Mochizuki
 * 🇸🇪 Jonathan Mridha
 * 🇯🇵 Ryota Tanuma
 * 🇯🇵 James Trotter

The following player received entry as a lucky loser:
 * 🇯🇵 Rimpei Kawakami

Seeds

 * 1 Rankings are as of 31 October 2022.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇯🇵 Anri Nagata
 * 🇯🇵 Remika Ohashi
 * 🇯🇵 Suzuho Oshino
 * 🇯🇵 Karen Tsutsumi

The following player received entry into the singles main draw using a protected ranking:
 * 🇯🇵 Ayano Shimizu

The following players received entry from the qualifying draw:
 * 🇯🇵 Erina Hayashi
 * 🇯🇵 Aoi Ito
 * 🇯🇵 Miyu Kato
 * 🇯🇵 Natsumi Kawaguchi
 * 🇯🇵 Honoka Kobayashi
 * 🇯🇵 Michika Ozeki
 * 🇯🇵 Himari Sato
 * 🇯🇵 Eri Shimizu

The following players received entry as a lucky loser:
 * 🇯🇵 Yuka Hosoki

Men's singles

 * 🇦🇺 Christopher O'Connell def. 🇯🇵 Yosuke Watanuki 6–1, 6–7(5–7), 6–3.

Women's singles

 * 🇰🇷 Han Na-lae def. 🇯🇵 Miyu Kato, 7–5, 6–0

Men's doubles

 * 🇷🇴 Victor Vlad Cornea / Ruben Gonzales def. 🇯🇵 Tomoya Fujiwara / 🇯🇵 Masamichi Imamura 7–5, 6–3.

Women's doubles

 * 🇯🇵 Saki Imamura / 🇯🇵 Naho Sato def. 🇰🇷 Han Na-lae / 🇯🇵 Mai Hontama, 6–4, 4–6, [10–5]