| Men's singles | |
|---|---|
| 2024 Jinan Open | |
| Champion |  Wu Yibing |
| Runner-up |  Rio Noguchi |
| Score | 7–5, 6–3 |
Zhang Zhizhen was the defending champion [1] but chose not to defend his title.
Wu Yibing won the title after defeating Rio Noguchi 7–5, 6–3 in the final.
Yuta Shimizu (semifinals) Bai Yan (second round)
Ryan Peniston (first round)
Wu Tung-lin (second round) Rio Noguchi (final) Cui Jie (first round)
Mikalai Haliak (first round) Kaichi Uchida (first round)| Semifinals | Final | ||||||||||||
| 1 | Yuta Shimizu | 64 | 6 | 5 | |||||||||
| 5 | Rio Noguchi | 77 | 3 | 7 | |||||||||
| 5 | Rio Noguchi | 5 | 3 | ||||||||||
| WC | Wu Yibing | 7 | 6 | ||||||||||
| WC | Wu Yibing | 3 | 6 | 6 | |||||||||
| Q |  Keegan Smith | 6 | 0 | 2 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Y Shimizu | 6 | 6 | ||||||||||||||||||||||||
| WC | Jin Yuquan | 4 | 2 | 1 | Y Shimizu | 6 | 6 | ||||||||||||||||||||
| Alafia Ayeni | 64 | 2 | Y Zhou | 2 | 1 | ||||||||||||||||||||||
| Y Zhou | 77 | 6 | 1 | Y Shimizu | 6 | 5 | 7 | ||||||||||||||||||||
 P Henning | 6 | 6 | P Henning | 4 | 7 | 5 | |||||||||||||||||||||
| H Moriya | 0 | 4 | P Henning | 6 | 6 | ||||||||||||||||||||||
| Q |  Shin San-hui | 6 | 6 | Q | S-h Shin | 2 | 3 | ||||||||||||||||||||
| 6 | Cui Jie | 0 | 2 | 1 | Y Shimizu | 64 | 6 | 5 | |||||||||||||||||||
| 3 | R Peniston | 5 | 3 | 5 | R Noguchi | 77 | 3 | 7 | |||||||||||||||||||
| Q | Shin Woo-bin | 7 | 6 | Q | W-b Shin | 3 | 6 | 6 | |||||||||||||||||||
| Alt |  A Rai | 6 | 1 | 6 | Alt | A Rai | 6 | 1 | 4 | ||||||||||||||||||
 A Weber | 4 | 6 | 3 | Q | W-b Shin | 3 | 2 | ||||||||||||||||||||
| Kris van Wyk | 63 | 4 | 5 | R Noguchi | 6 | 6 | |||||||||||||||||||||
| A McHugh | 77 | 6 | A McHugh | 3 | 3 | ||||||||||||||||||||||
| B Bobrov | 5 | 4 | 5 | R Noguchi | 6 | 6 | |||||||||||||||||||||
| 5 | R Noguchi | 7 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | K Uchida | 69 | 6 | 69 | |||||||||||||||||||||||
| Q |  Jacob Bradshaw | 711 | 2 | 711 | Q | J Bradshaw | 2 | 6 | 64 | ||||||||||||||||||
| F Sun | 6 | 6 | F Sun | 6 | 2 | 77 | |||||||||||||||||||||
| E Karlovskiy | 2 | 4 | F Sun | 3 | 2 | ||||||||||||||||||||||
 S Sakellaridis | 6 | 1 | 4 | WC | Y Wu | 6 | 6 | ||||||||||||||||||||
| WC | Y Wu | 4 | 6 | 6 | WC | Y Wu | 7 | 7 | |||||||||||||||||||
| WC | Xiao Linang | 3 | 4 | 4 | T-l Wu | 5 | 5 | ||||||||||||||||||||
| 4 | T-l Wu | 6 | 6 | WC | Y Wu | 3 | 6 | 6 | |||||||||||||||||||
| 7 | Mikalai Haliak | 4 | 1 | Q | K Smith | 6 | 0 | 2 | |||||||||||||||||||
| Q | K Smith | 6 | 6 | Q | K Smith | 78 | 7 | ||||||||||||||||||||
 Dominik Palán | 3 | 77 | 3 | Q | J-s Nam | 66 | 5 | ||||||||||||||||||||
| Q | J-s Nam | 6 | 65 | 6 | Q | K Smith | 6 | 6 | |||||||||||||||||||
| Q | Y Mo | 6 | 6 | Q | Y Mo | 2 | 2 | ||||||||||||||||||||
| Makoto Ochi | 2 | 3 | Q | Y Mo | 6 | 65 | 6 | ||||||||||||||||||||
| E Donskoy | 2 | 66 | 2 | Y Bai | 4 | 77 | 4 | ||||||||||||||||||||
| 2 | Y Bai | 6 | 78 | ||||||||||||||||||||||||
Lu Yen-hsun was the defending champion.
Peter Gojowczyk won the title, defeating Suk-Young Jeong 6–3, 6–1 in the final.
Grega Žemlja was the defending champion but chose not to compete.
Márton Fucsovics won the title by defeating James Ward 7–5, 3–6, 6–3 in the final.
Grega Žemlja was the defending champion, but chose not to compete.
Top seeded Lu Yen-Hsun beat Go Soeda 6–2, 6–4, to claim the title.
Oliver Anderson won the title, defeating Jurabek Karimov in the final, 6–2, 1–6, 6–1.
Alexander Sarkissian was the defending champion but chose not to defend his title.
Jelena Janković was the defending champion, but chose to participate in Florianópolis instead.
Wu Yibing was the defending champion but lost in the second round to Li Zhe.
Zhang Ze was the defending champion but lost in the third round to Bai Yan.
Elias Ymer was the defending champion but chose not to defend his title.
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Taylor Fritz defeated Frances Tiafoe in the final, 7–6(7–3), 7–6(7–2) to win the singles tennis title at the 2022 Japan Open.
James Duckworth was the defending champion but lost in the quarterfinals to Rinky Hijikata.
This was the first edition of the tournament as an ATP Challenger Tour event.
Yūichi Sugita was the defending champion but lost in the second round to Colin Sinclair.
Taro Daniel was the defending champion but chose not to defend his title.
James Duckworth was the defending champion but lost in the second round to Miljan Zekić.
Wu Tung-lin was the defending champion but lost in the final to Zizou Bergs.
Gabriel Diallo was the defending champion but chose not to defend his title.
Yasutaka Uchiyama was the defending champion but retired from his second round match against Christopher O'Connell.
Matthew Ebden and Divij Sharan were the defending champions but chose not to defend their title.