# 2022 Yokkaichi Challenger – Singles

Yūichi Sugita was the defending champion but lost in the second round to Colin Sinclair.
Yosuke Watanuki won the title after defeating Frederico Ferreira Silva 6–2, 6–2 in the final.

## Seeds

* Kaichi Uchida (semifinals)
* James Duckworth (semifinals)
* Yosuke Watanuki (champion)
* Rio Noguchi (first round)
* Hsu Yu-hsiou (first round)
* Nicholas David Ionel (quarterfinals)
* Lý Hoàng Nam (second round)
* Dane Sweeny (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Kaichi Uchida | 2 | 2 | | | | |
| | Frederico Ferreira Silva | 6 | 6 | | | | |
| | Frederico Ferreira Silva | 6 | 6 | | Frederico Ferreira Silva | 2 | 2 |
| | | | | 3 | Yosuke Watanuki | 6 | 6 |
| 3 | Yosuke Watanuki | 7$^7$ | 6 | 3 | Yosuke Watanuki | 6 | 6 |
| 2 | James Duckworth | 6$^3$ | 3 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | K Uchida | 6 | 1 | 6 | | | | | | | | | | | | | | |
| | P Gunneswaran | 3 | 6 | 3 | 1 | K Uchida | 6 | 6 | | | | | | | | | | |
| WC | S Hazawa | 7 | 6 | | WC | S Hazawa | 3 | 4 | | | | | | | | | | |
| | H Moriya | 5 | 1 | | | | | | | 1 | K Uchida | 4 | 6 | 7 | | | | |
| | S Shimabukuro | 6 | 6 | | | | | | | | S Shimabukuro | 6 | 2 | 5 | | | | |
| Q | Shuichi Sekiguchi | 4 | 3 | | | S Shimabukuro | 6 | 6 | | | | | | | | | | |
| LL | J Trotter | 3 | 1 | | 7 | NH Lý | 2 | 3 | | | | | | | | | | |
| 7 | NH Lý | 6 | 6 | | | | | | | | | | | | 1 | K Uchida | 2 | 2 |
| 4 | R Noguchi | 4 | 6 | 1 | | | | | | | | | | | | F Ferreira Silva | 6 | 6 |
| PR | Y Sugita | 6 | 1 | 6 | PR | Y Sugita | 4 | 3 | | | | | | | | | | |
| | R Ramanathan | 2 | 2 | | Q | C Sinclair | 6 | 6 | | | | | | | | | | |
| Q | C Sinclair | 6 | 6 | | | | | | | Q | C Sinclair | 2 | 6 | 3 | | | | |
| | S Mochizuki | 6 | 6 | | | | | | | | F Ferreira Silva | 6 | 3 | 6 | | | | |
| Q | Yuki Mochizuki | 1 | 1 | | | S Mochizuki | 6 | 1 | 3 | | | | | | | | | |
| | F Ferreira Silva | 6 | 2 | 6 | | F Ferreira Silva | 3 | 6 | 6 | | | | | | | | | |
| 5 | Y-h Hsu | 2 | 6 | 2 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | D Sweeny | 5 | 2 | | | | | | | | | | | | | | |
| | Y-s Chung | 7 | 6 | | Y-s Chung | 6 | 6 | | | | | | | | | | |
| WC | N Nakagawa | 3 | 6$^4$ | | M Sasikumar | 1 | 4 | | | | | | | | | | |
| | M Sasikumar | 6 | 7$^7$ | | | | | | | Y-s Chung | 2 | 2$^r$ | | | | | |
| | B Zhukayev | 6 | 6 | | | | | | 3 | Yo Watanuki | 6 | 5 | | | | | |
| | Y Shimizu | 1 | 4 | | B Zhukayev | 0 | 1$^r$ | | | | | | | | | | |
| | Z Kolář | 2 | 4 | 3 | Yo Watanuki | 6 | 4 | | | | | | | | | | |
| 3 | Yo Watanuki | 6 | 6 | | | | | | | | | | | 3 | Yo Watanuki | 7$^7$ | 6 |
| 6 | ND Ionel | 6 | 7$^7$ | | | | | | | | | | | 2 | J Duckworth | 6$^3$ | 3 |
| | N Serdarušić | 4 | 6$^1$ | 6 | ND Ionel | 6 | 6 | | | | | | | | | | |
| Q | Keisuke Saitoh | 4 | 0 | WC | S Imai | 4 | 4 | | | | | | | | | | |
| WC | Shintaro Imai | 6 | 6 | | | | | | 6 | ND Ionel | 6 | 3 | 3 | | | | |
| | FC Jianu | 1 | | | | | | | 2 | J Duckworth | 4 | 6 | 6 | | | | |
| Q | D-h Lee | 0$^r$ | | | FC Jianu | 7$^7$ | 2 | 2 | | | | | | | | | |
| Q | Makoto Ochi | 6$^2$ | 4 | 2 | J Duckworth | 6$^4$ | 6 | 6 | | | | | | | | | |
| 2 | J Duckworth | 7$^7$ | 6 | | | | | | | | | | | | | | |