| Season: | 1977 |
| Nextseason: | 1978 |
Statistics of Japan Soccer League for the 1977 season. This was the inaugural season of the Regional League promotion series, which replaced the Senior Cup as the source of the clubs promoted from the regional Japanese football leagues.
| JSL Division 1 | 1st leg | 2nd leg | JSL Division 2 | |
|---|---|---|---|---|
| Fujitsu | 3-1 | 3-0 | Nissan Motors | |
| Toyota Motors | 0-2 | 0-2 | Yomiuri |
| JSL | 1st leg | 2nd leg | Regional Series | |
|---|---|---|---|---|
| Furukawa Electric Chiba | 0-0(PK2-4) | 1-3 | Toshiba Horikawacho (Runner-up) | |
| Tanabe Pharmaceutical | 3-1 | 0-1 | Yamaha Motors (Champion) |