| 7. Jornada | 02.04.2023 | Fagiano Okayama | - | Iwaki FC | 1:1 |  |
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| 29. Jornada | 06.08.2023 | V-Varen Nagasaki | - | Iwaki FC | 0:0 | ||||
| 30. Jornada | 13.08.2023 | Iwaki FC | - | Ventforet Kofu | 1:1 | ||||
| 31. Jornada | 19.08.2023 | Iwaki FC | - | Tokyo Verdy | 0:0 | |
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| 32. Jornada | 27.08.2023 | Roasso Kumamoto | - | Iwaki FC | 2:4 | ||||
| 33. Jornada | 03.09.2023 | Iwaki FC | - | Fagiano Okayama | 1:2 | ||||
| 34. Jornada | 10.09.2023 | Tokushima Vortis | - | Iwaki FC | 2:0 | ||||
| 35. Jornada | 17.09.2023 | Thespakusatsu Gunma | - | Iwaki FC | 1:0 | ||||
| 36. Jornada | 23.09.2023 | Iwaki FC | - | Zweigen Kanazawa | 1:0 | |
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| 39. Jornada | 21.10.2023 | Iwaki FC | - | Shimizu S-Pulse | 1:7 | ||||
| 40. Jornada | 29.10.2023 | JEF United Chiba | - | Iwaki FC | 1:0 | ||||
| 41. Jornada | 04.11.2023 | Iwaki FC | - | Montedio Yamagata | 1:3 |  |
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| 42. Jornada | 12.11.2023 | Fujieda MyFC | - | Iwaki FC | 2:4 |
Japón