| 1999.03.14 | Oita Trinita | 1-0 | Hokkaido Consadole Sapporo | Home | Ave. Age | 25.2y.o. | Ave. Change Time | -min. |
| 1999.03.21 | Oita Trinita | 1-0 | Kawasaki Frontale | Home | Ave. Age | 24.8y.o. | Ave. Change Time | 80.0min. |
| 1999.03.28 | RB Omiya Ardija | 5-0 | Oita Trinita | Away | Ave. Age | 24.9y.o. | Ave. Change Time | 46.0min. |
| 1999.04.04 | Oita Trinita | 2-1 | Montedio Yamagata | Home | Ave. Age | 25.3y.o. | Ave. Change Time | 76.0min. |
| 1999.04.07 | Oita Trinita | 2-1 | Shonan Bellmare | Home | Ave. Age | 25.3y.o. | Ave. Change Time | 72.0min. |
| 1999.04.11 | Sagan Tosu | 1-3 | Oita Trinita | Away | Ave. Age | 24.9y.o. | Ave. Change Time | 60.0min. |
| 1999.04.14 | Shonan Bellmare | 0-0 | Oita Trinita | Away | Ave. Age | 24.6y.o. | Ave. Change Time | 75.0min. |
| 1999.04.17 | Oita Trinita | 1-1 | F.C.Tokyo | Home | Ave. Age | 24.9y.o. | Ave. Change Time | 95.5min. |
| 1999.04.25 | Vegalta Sendai | 1-3 | Oita Trinita | Away | Ave. Age | 24.8y.o. | Ave. Change Time | 50.0min. |
| 1999.04.29 | Oita Trinita | 1-1 | Ventforet Kofu | Home | Ave. Age | 25.0y.o. | Ave. Change Time | 97.0min. |
| 1999.05.02 | Oita Trinita | 1-0 | Albirex Niigata | Home | Ave. Age | 24.7y.o. | Ave. Change Time | 82.0min. |
| 1999.05.05 | Kawasaki Frontale | 2-1 | Oita Trinita | Away | Ave. Age | 25.0y.o. | Ave. Change Time | 40.0min. |
| 1999.05.09 | Oita Trinita | 1-0 | RB Omiya Ardija | Home | Ave. Age | 24.2y.o. | Ave. Change Time | 90.0min. |
| 1999.05.16 | Montedio Yamagata | 2-1 | Oita Trinita | Away | Ave. Age | 23.8y.o. | Ave. Change Time | 75.0min. |
| 1999.05.22 | Oita Trinita | 4-0 | Sagan Tosu | Home | Ave. Age | 24.4y.o. | Ave. Change Time | 75.7min. |
| 1999.05.29 | F.C.Tokyo | 1-0 | Oita Trinita | Away | Ave. Age | 25.1y.o. | Ave. Change Time | 65.0min. |
| 1999.06.12 | Oita Trinita | 1-0 | Urawa Reds | Home | Ave. Age | 25.0y.o. | Ave. Change Time | 60.0min. |
| 1999.06.19 | Urawa Reds | 3-1 | Oita Trinita | Away | Ave. Age | 25.0y.o. | Ave. Change Time | 62.0min. |
| 1999.06.26 | Oita Trinita | 2-0 | Vegalta Sendai | Home | Ave. Age | 25.0y.o. | Ave. Change Time | 87.0min. |
| 1999.07.03 | Ventforet Kofu | 1-2 | Oita Trinita | Away | Ave. Age | 25.1y.o. | Ave. Change Time | 63.0min. |
| 1999.07.11 | Albirex Niigata | 0-2 | Oita Trinita | Away | Ave. Age | 24.5y.o. | Ave. Change Time | 64.0min. |
| 1999.07.17 | Hokkaido Consadole Sapporo | 1-0 | Oita Trinita | Away | Ave. Age | 25.1y.o. | Ave. Change Time | 77.0min. |
| 1999.08.01 | Montedio Yamagata | 1-0 | Oita Trinita | Away | Ave. Age | 24.5y.o. | Ave. Change Time | 71.7min. |
| 1999.08.07 | Oita Trinita | 2-4 | F.C.Tokyo | Home | Ave. Age | 26.2y.o. | Ave. Change Time | 80.0min. |
| 1999.08.15 | Hokkaido Consadole Sapporo | 3-2 | Oita Trinita | Away | Ave. Age | 25.0y.o. | Ave. Change Time | 63.7min. |
| 1999.08.21 | Oita Trinita | 0-1 | Kawasaki Frontale | Home | Ave. Age | 25.1y.o. | Ave. Change Time | 79.3min. |
| 1999.08.31 | Ventforet Kofu | 0-4 | Oita Trinita | Away | Ave. Age | 25.2y.o. | Ave. Change Time | 79.3min. |
| 1999.09.05 | Oita Trinita | 5-0 | RB Omiya Ardija | Home | Ave. Age | 25.7y.o. | Ave. Change Time | 72.0min. |
| 1999.09.12 | Vegalta Sendai | 1-2 | Oita Trinita | Away | Ave. Age | 25.2y.o. | Ave. Change Time | 70.7min. |
| 1999.09.15 | Oita Trinita | 0-1 | Albirex Niigata | Home | Ave. Age | 25.2y.o. | Ave. Change Time | 72.0min. |
| 1999.09.19 | Sagan Tosu | 2-3 | Oita Trinita | Away | Ave. Age | 25.6y.o. | Ave. Change Time | 70.7min. |
| 1999.09.25 | F.C.Tokyo | 4-2 | Oita Trinita | Away | Ave. Age | 25.2y.o. | Ave. Change Time | 49.7min. |
| 1999.10.02 | Oita Trinita | 2-0 | Hokkaido Consadole Sapporo | Home | Ave. Age | 25.8y.o. | Ave. Change Time | 83.7min. |
| 1999.10.11 | Kawasaki Frontale | 0-3 | Oita Trinita | Away | Ave. Age | 26.6y.o. | Ave. Change Time | 81.0min. |
| 1999.10.16 | Oita Trinita | 2-1 | Ventforet Kofu | Home | Ave. Age | 26.0y.o. | Ave. Change Time | 57.5min. |
| 1999.10.24 | RB Omiya Ardija | 2-3 | Oita Trinita | Away | Ave. Age | 26.2y.o. | Ave. Change Time | 83.0min. |
| 1999.10.31 | Oita Trinita | 1-0 | Vegalta Sendai | Home | Ave. Age | 26.1y.o. | Ave. Change Time | 91.0min. |
| 1999.11.06 | Albirex Niigata | 2-1 | Oita Trinita | Away | Ave. Age | 25.0y.o. | Ave. Change Time | 69.5min. |
| 1999.11.13 | Oita Trinita | 3-2 | Sagan Tosu | Home | Ave. Age | 25.6y.o. | Ave. Change Time | 86.7min. |
| 1999.11.21 | Oita Trinita | 1-1 | Montedio Yamagata | Home | Ave. Age | 25.8y.o. | Ave. Change Time | 70.7min. |