| 1. Round | 21/08/1998 | Verdy Kawasaki | - | Gamba Osaka | 1:2 | ||||
| 2. Round | 28/08/1998 | Gamba Osaka | - | Vissel Kobe | 1:0 aet | ||||
| 3. Round | 04/09/1998 | JEF United Ichihara | - | Gamba Osaka | 0:1 aet | ||||
| 4. Round | 11/09/1998 | Gamba Osaka | - | Yokohama Flügels | 1:4 pso | ||||
| 5. Round | 14/09/1998 | Cerezo Osaka | - | Gamba Osaka | 2:1 |  |
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| 6. Round | 18/09/1998 | Gamba Osaka | - | Sanfrecce Hiroshima | 0:2 | ||||
| 7. Round | 22/09/1998 | Avispa Fukuoka | - | Gamba Osaka | 1:0 | ||||
| 8. Round | 25/09/1998 | Gamba Osaka | - | Consadole Sapporo | 1:0 | ||||
| 9. Round | 02/10/1998 | Shimizu S-Pulse | - | Gamba Osaka | 4:1 | ||||
| 10. Round | 13/10/1998 | Gamba Osaka | - | Kashima Antlers | 1:3 | ||||
| 11. Round | 16/10/1998 | Kashiwa Reysol | - | Gamba Osaka | 2:0 | |
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| 12. Round | 20/10/1998 | Kyoto Purple Sanga | - | Gamba Osaka | 1:3 |  |
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| 13. Round | 23/10/1998 | Gamba Osaka | - | Yokohama F. Marinos | 1:4 | ||||
| 14. Round | 30/10/1998 | Urawa Red Diamonds | - | Gamba Osaka | 1:0 | ||||
| 15. Round | 02/11/1998 | Gamba Osaka | - | Nagoya Grampus Eight | 2:3 | ||||
| 16. Round | 06/11/1998 | Bellmare Hiratsuka | - | Gamba Osaka | 2:1 | ||||
| 17. Round | 13/11/1998 | Gamba Osaka | - | Júbilo Iwata | 4:5 |
French Guyana