| 12. Round | 03/09/2023 | Kawasaki Frontale [U18] | - | Omiya Ardija [U18] | 3:0 | ||||
| 13. Round | 10/09/2023 | Ryutsu Keizai University [U18] | - | Kawasaki Frontale [U18] | 0:1 |  |
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| 14. Round | 17/09/2023 | Maebashi Ikuei High School [U18] | - | Kawasaki Frontale [U18] | 0:3 | |
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| 15. Round | 23/09/2023 | Kawasaki Frontale [U18] | - | Shohei High School [U18] | 3:0 | ||||
| 17. Round | 08/10/2023 | Aomori Yamada High School [U18] | - | Kawasaki Frontale [U18] | 2:1 | ||||
| 18. Round | 15/10/2023 | Kawasaki Frontale [U18] | - | Asahikawa Business High School [U18] | 8:0 | |
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| 19. Round | 22/10/2023 | Yokohama F. Marinos [U18] | - | Kawasaki Frontale [U18] | 0:3 | |
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| 16. Round | 25/10/2023 | Ichiritsu Funabashi High School [U18] | - | Kawasaki Frontale [U18] | 3:2 | ||||
| 20. Round | 18/11/2023 | FC Tokyo [U18] | - | Kawasaki Frontale [U18] | 0:2 | |
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| 21. Round | 25/11/2023 | Kawasaki Frontale [U18] | - | Kashiwa Reysol [U18] | 1:0 | ||||
| 22. Round | 03/12/2023 | Kawasaki Frontale [U18] | - | Shoshi High School [U18] | 1:2 |
Japan