2022 Yokkaichi Challenger

Country	Player	Rank1	Seed
JPN	Kaichi Uchida	161	1
AUS	James Duckworth	173	2
JPN	Yosuke Watanuki	196	3
JPN	Rio Noguchi	205	4
TPE	Hsu Yu-hsiou	217	5
ROU	Nicholas David Ionel	233	6
VIE	Lý Hoàng Nam	234	7
AUS	Dane Sweeny	248	8

• ¹ Rankings are as of 14 November 2022.^[1]

The following players received wildcards into the singles main draw:

• Shinji Hazawa
• Shintaro Imai
• Naoki Nakagawa

The following player received entry into the singles main draw using a protected ranking:

• Yūichi Sugita

The following players received entry from the qualifying draw:

• Lee Duck-hee
• Yuki Mochizuki
• Makoto Ochi
• Keisuke Saitoh
• Shuichi Sekiguchi
• Colin Sinclair

The following player received entry as a lucky loser:

• James Trotter

• Yosuke Watanuki def. Frederico Ferreira Silva 6–2, 6–2.^[2]

• Hsu Yu-hsiou / Yuta Shimizu def. Masamichi Imamura / Rio Noguchi 7–6^(7–2), 6–4.