| Season: | 1984 |
| Nextseason: | 1985–86 |
Statistics of Japan Soccer League for the 1984 season. No promotion/relegation series for both division were held due to expansion of both divisions in the following season.
No relegation took place due to expansion to 12 clubs.
Yomiuri was invited to the revived Asian Club Championship, but withdrew.
| Competition: | Japan Soccer League First Division |
| Season: | 1984 |
| Winners: | Yomiuri |
| Matches: | 90 |
| Total Goals: | 245 |
| Prevseason: | 1983 |
| Nextseason: | 1985 |
No relegation took place due to expansion to 12 clubs.
| Competition: | Japan Soccer League Second Division |
| Season: | 1984 |
| Winners: | Sumitomo |
| Promoted: | Sumitomo ANA Yokohama |
| Matches: | 90 |
| Total Goals: | 258 |
| Prevseason: | 1983 |
| Nextseason: | 1985 |