| 2. Round | 12/03/2005 | RB Omiya Ardija | - | Vissel Kobe | 1:1 | ||||
| 3. Round | 02/04/2005 | RB Omiya Ardija | - | Cerezo Osaka | 1:0 | ||||
| 4. Round | 09/04/2005 | Albirex Niigata | - | RB Omiya Ardija | 3:2 | ||||
| 8. Round | 28/04/2005 | RB Omiya Ardija | - | Oita Trinita | 3:1 | ||||
| 9. Round | 01/05/2005 | Shimizu S-Pulse | - | RB Omiya Ardija | 2:1 | ||||
| 10. Round | 04/05/2005 | RB Omiya Ardija | - | Kashiwa Reysol | 1:0 | ||||
| 16. Round | 13/07/2005 | RB Omiya Ardija | - | Kawasaki Frontale | 1:0 | ||||
| 17. Round | 18/07/2005 | JEF United Chiba | - | RB Omiya Ardija | 2:0 | ||||
| 19. Round | 21/08/2005 | Tokyo Verdy | - | RB Omiya Ardija | 1:1 | ||||
| 22. Round | 03/09/2005 | RB Omiya Ardija | - | Albirex Niigata | 1:4 | ||||
| 23. Round | 10/09/2005 | Júbilo Iwata | - | RB Omiya Ardija | 2:0 | ||||
| 25. Round | 24/09/2005 | Kawasaki Frontale | - | RB Omiya Ardija | 2:1 |  |
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| 26. Round | 01/10/2005 | RB Omiya Ardija | - | FC Tokyo | 0:1 | ||||
| 27. Round | 15/10/2005 | Cerezo Osaka | - | RB Omiya Ardija | 1:0 |
Japan