# 2024 Yokkaichi Challenger – Singles

Zizou Bergs was the defending champion but chose not to defend his title.
Rei Sakamoto won the title after defeating Christoph Negritu 1–6, 6–3, 6–4 in the final.

## Seeds

* Yoshihito Nishioka (second round, withdrew)
* Mattia Bellucci (first round)
* Yasutaka Uchiyama (withdrew)
* Coleman Wong (second round)
* Omar Jasika (second round)
* Li Tu (quarterfinals)
* Sho Shimabukuro (second round)
* Yuta Shimizu (quarterfinals)
* Hsu Yu-hsiou (withdrew)

## 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 | Semifinals | Final | Final | Final | Final | Final |
| | Shintaro Mochizuki | 2 | 6 | 4 | | | | | |
| WC | Rei Sakamoto | 6 | 4 | 6 | | | | | |
| WC | Rei Sakamoto | 6 | 4 | 6 | WC | Rei Sakamoto | 1 | 6 | 6 |
| | | | | | Q | Christoph Negritu | 6 | 3 | 4 |
| | Philip Sekulic | 0 | 7$^8$ | 6$^r$ | Q | Christoph Negritu | 6 | 3 | 4 |
| Q | Christoph Negritu | 6 | 6$^6$ | 6 | | | | | |

### Top 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 | Semifinals |
| 1 | Y Nishioka | 6 | 6 | | | | | | | | | | | | | | | |
| Q | H Moriya | 4 | 3 | 1 | Y Nishioka | | | | | | | | | | | | | |
| | S Mochizuki | 7 | 6 | | S Mochizuki | w/o | | | | | | | | | | | | |
| | J McCabe | 5 | 4 | | | | | | | S Mochizuki | 6 | 1 | 6 | | | | | |
| | E Ymer | 7$^7$ | 6 | | | | | | 6 | L Tu | 4 | 6 | 4 | | | | | |
| | A Zakharov | 6$^5$ | 4 | | E Ymer | 4 | 6 | 4 | | | | | | | | | | |
| WC | Yua Taka | 2 | 3 | 6 | L Tu | 6 | 3 | 6 | | | | | | | | | | |
| 6 | L Tu | 6 | 6 | | | | | | | | | | | | S Mochizuki | 2 | 6 | 4 |
| Q | P Henning | 4 | 3 | | | | | | | | | | | WC | R Sakamoto | 6 | 4 | 6 |
| WC | R Sakamoto | 6 | 6 | WC | R Sakamoto | 7$^{11}$ | 6 | | | | | | | | | | | |
| | D Sweeny | 6$^{10}$ | 2 | Alt | N Nakagawa | 6$^9$ | 3 | | | | | | | | | | | |
| Alt | N Nakagawa | 7$^{12}$ | 6 | | | | | | WC | R Sakamoto | 6 | 7$^7$ | | | | | | |
| | K Uchida | 6 | 6 | | | | | | | K Uchida | 4 | 6$^3$ | | | | | | |
| WC | K Isomura | 0 | 1 | | K Uchida | 2 | 6 | 6 | | | | | | | | | | |
| Q | Ryotaro Taguchi | 4 | 1 | 7 | S Shimabukuro | 6 | 4 | 2 | | | | | | | | | | |
| 7 | S Shimabukuro | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | Y Shimizu | 7 | 6 | | | | | | | | | | | | | | | |
| LL | Alafia Ayeni | 5 | 3 | | 8 | Y Shimizu | 3 | 6 | 6 | | | | | | | | | |
| LL | Petr Bar Biryukov | 7$^7$ | 7$^{10}$ | | LL | P Bar Biryukov | 6 | 3 | 4 | | | | | | | | | |
| | Y Demin | 6$^3$ | 6$^8$ | | | | | | | 8 | Y Shimizu | 3 | 1 | | | | | |
| Q | Y Takahashi | 3 | 2 | | | | | | | | P Sekulic | 6 | 6 | | | | | |
| | P Sekulic | 6 | 6 | | | P Sekulic | 6 | 2 | 6 | | | | | | | | | |
| | M Imamura | 6 | 5 | 4 | 4 | C Wong | 3 | 6 | 4 | | | | | | | | | |
| 4 | C Wong | 2 | 7 | 6 | | | | | | | | | | | P Sekulic | 0 | 7$^8$ | 6$^r$ |
| 5 | O Jasika | 6 | 6 | | | | | | | | | | | Q | C Negritu | 6 | 6$^6$ | 6 |
| | Kris van Wyk | 1 | 2 | | 5 | O Jasika | 4 | 6 | 4 | | | | | | | | | |
| | B Hassan | 6 | 5 | 6 | | B Hassan | 6 | 0 | 6 | | | | | | | | | |
| Q | J Paul | 3 | 7 | 2 | | | | | | | B Hassan | 1$^r$ | | | | | | |
| | T-l Wu | 4 | 3 | | | | | | | Q | C Negritu | 4 | | | | | | |
| | F Cinà | 6 | 6 | | | F Cinà | 5 | 2 | | | | | | | | | | |
| Q | C Negritu | 6$^1$ | 6 | 7 | Q | C Negritu | 7 | 6 | | | | | | | | | | |
| 2 | M Bellucci | 7$^7$ | 2 | 5 | | | | | | | | | | | | | | |