| Season: | 1973 |
| Nextseason: | 1974 |
The 1973 season of Japanese football.
Tanabe Pharmaceuticals was relegated, thereby becoming the first Japanese team to go straight back down one season after promotion.
| JSL Division 1 | 1st leg | 2nd leg | JSL Division 2 | |
|---|---|---|---|---|
| Nippon Kokan | 2-1 | 2-2 | Kofu SC | |
| Tanabe Pharmaceutical | 2-1 | 0-2 | Eidai Industries |
Sumitomo, at the time based in Osaka, would move to Kashima, Ibaraki in 1975 and become today's Kashima Antlers.
| JSL | 1st leg | 2nd leg | Senior Cup | |
|---|---|---|---|---|
| 1-1 | 1-2 | Hitachi Ibaraki (Cup runner-up) | ||
| Hagoromo Club | 2-2 | 1-2 | Sumitomo Metal (Cup winner) |