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.

2022 Keio Challenger
Date	31 October – 6 November (men's) 7 – 13 November (women's)
Edition	15th (men's) 5th (women's)
Category	ATP Challenger Tour ITF Women's World Tennis Tour
Surface	Hard
Location	Yokohama, Japan
Champions
Men's singles
Christopher O'Connell
Women's singles
Han Na-lae
Men's doubles
Victor Vlad Cornea / Ruben Gonzales
Women's doubles
Saki Imamura / Naho Sato

Men's singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
AUS	Christopher O'Connell	100	1
AUS	John Millman	142	2
JPN	Kaichi Uchida	168	3
BIH	Damir Džumhur	180	4
TPE	Wu Tung-lin	207	5
JPN	Hiroki Moriya	213	6
JPN	Yosuke Watanuki	223	7
CZE	Zdeněk Kolář	235	8

• 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

Women's singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
KOR	Han Na-lae	185	1
JPN	Mai Hontama	260	2
JPN	Kyōka Okamura	304	3
JPN	Himeno Sakatsume	305	4
JPN	Sakura Hosogi	316	5
THA	Luksika Kumkhum	330	6
JPN	Haruka Kaji	337	7
JPN	Chihiro Muramatsu	348	8

• 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

Champions

Men's singles

Main article: 2022 Keio Challenger – 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

Main article: 2022 Keio Challenger – 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]