| 1. Round | 24/02/2024 | Mito HollyHock | - | Iwaki FC | 1:0 | ||||
| 2. Round | 03/03/2024 | Iwaki FC | - | Fagiano Okayama | 1:1 | ||||
| 3. Round | 09/03/2024 | Iwaki FC | - | Kagoshima United | 3:1 | ||||
| 4. Round | 17/03/2024 | Roasso Kumamoto | - | Iwaki FC | 0:6 |  |
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| 5. Round | 20/03/2024 | Ventforet Kofu | - | Iwaki FC | 1:1 | ||||
| 6. Round | 24/03/2024 | Iwaki FC | - | Montedio Yamagata | 0:0 | ||||
| 7. Round | 30/03/2024 | Blaublitz Akita | - | Iwaki FC | 1:0 | ||||
| 8. Round | 03/04/2024 | Iwaki FC | - | Fujieda MyFC | 3:0 | ||||
| 9. Round | 07/04/2024 | Yokohama FC | - | Iwaki FC | 2:2 | |
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| 10. Round | 13/04/2024 | Iwaki FC | - | Shimizu S-Pulse | 2:3 | ||||
| 11. Round | 21/04/2024 | Oita Trinita | - | Iwaki FC | 0:2 | |
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| 12. Round | 28/04/2024 | Tochigi SC | - | Iwaki FC | 0:1 | ||||
| 13. Round | 03/05/2024 | Iwaki FC | - | JEF United Chiba | 1:0 | ||||
| 14. Round | 06/05/2024 | Ehime FC | - | Iwaki FC | 0:0 | ||||
| 15. Round | 12/05/2024 | Iwaki FC | - | Renofa Yamaguchi | 1:2 | ||||
| 16. Round | 18/05/2024 | Thespa Gunma | - | Iwaki FC | 0:1 | ||||
| 17. Round | 26/05/2024 | Iwaki FC | - | Tokushima Vortis | 1:1 | ||||
| 22. Round | 29/06/2024 | Iwaki FC | - | Yokohama FC | 0:4 |
Japan