| Season | 2003 |
|---|---|
| Champions | Yokohama F. Marinos 2nd J.League title 4th Japanese title |
| Relegated | Vegalta Sendai Kyoto Purple Sanga |
| AFC Champions League | Yokohama F. Marinos Júbilo Iwata |
| Matches played | 240 |
| Goals scored | 718 (2.99 per match) |
| Top goalscorer | Ueslei (22 goals) |
| Highest attendance | 59,728 (Round 15, Yokohama F. Marinos vs. Vissel Kobe) |
| Lowest attendance | 3,452 (Round 3, JEF United Ichihara vs. Vissel Kobe) |
| Average attendance | 17,351 |
← 2002 2004 → | |
The 2003 season was the 11th season since the establishment of the J.League. The league began on March 15 and ended on November 29.