| 1. Round | 21/08/1998 | Vissel Kobe | - | Kashiwa Reysol | 0:2 |  |
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| 2. Round | 28/08/1998 | Kashiwa Reysol | - | JEF United Ichihara | 1:0 | ||||
| 3. Round | 04/09/1998 | Yokohama Flügels | - | Kashiwa Reysol | 1:2 | ||||
| 4. Round | 11/09/1998 | Kashiwa Reysol | - | Cerezo Osaka | 3:1 | ||||
| 5. Round | 14/09/1998 | Sanfrecce Hiroshima | - | Kashiwa Reysol | 8:9 pso | ||||
| 6. Round | 18/09/1998 | Kashiwa Reysol | - | Avispa Fukuoka | 1:2 aet | ||||
| 7. Round | 22/09/1998 | Consadole Sapporo | - | Kashiwa Reysol | 3:2 | ||||
| 8. Round | 25/09/1998 | Kashiwa Reysol | - | Shimizu S-Pulse | 1:2 | ||||
| 9. Round | 02/10/1998 | Kashima Antlers | - | Kashiwa Reysol | 3:0 | |
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| 10. Round | 13/10/1998 | Kyoto Purple Sanga | - | Kashiwa Reysol | 5:3 pso |  |
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| 11. Round | 16/10/1998 | Kashiwa Reysol | - | Gamba Osaka | 2:0 | ||||
| 12. Round | 20/10/1998 | Yokohama F. Marinos | - | Kashiwa Reysol | 0:1 | |
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| 14. Round | 30/10/1998 | Nagoya Grampus Eight | - | Kashiwa Reysol | 4:2 | ||||
| 15. Round | 02/11/1998 | Kashiwa Reysol | - | Bellmare Hiratsuka | 1:3 | ||||
| 17. Round | 13/11/1998 | Kashiwa Reysol | - | Verdy Kawasaki | 2:1 |
Japan