| 1. Round | 04/04/2021 | Gamba Osaka [U18] | - | East Fukuoka High School [U18] | 2:1 | ||||
| 2. Round | 10/04/2021 | Cerezo Osaka [U18] | - | Gamba Osaka [U18] | 0:3 |  |
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| 3. Round | 18/04/2021 | Gamba Osaka [U18] | - | Vissel Kobe [U18] | 6:2 | |
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| 9. Round | 04/07/2021 | Gamba Osaka [U18] | - | Sagan Tosu [U18] | 0:1 | ||||
| 14. Round | 09/10/2021 | Gamba Osaka [U18] | - | Júbilo Iwata [U18] | 1:0 | ||||
| 15. Round | 16/10/2021 | Sanfrecce Hiroshima [U18] | - | Gamba Osaka [U18] | 5:1 | ||||
| 4. Round | 23/10/2021 | Gamba Osaka [U18] | - | Kyoto Sanga FC [U18] | 1:1 | ||||
| 8. Round | 31/10/2021 | Nagoya Grampus [U18] | - | Gamba Osaka [U18] | 4:1 | ||||
| 5. Round | 06/11/2021 | Júbilo Iwata [U18] | - | Gamba Osaka [U18] | 0:5 | ||||
| 6. Round | 14/11/2021 | Gamba Osaka [U18] | - | Sanfrecce Hiroshima [U18] | 6:1 | ||||
| 16. Round | 21/11/2021 | Gamba Osaka [U18] | - | Otsu High School [U18] | 2:2 |
Japan