The 1990–91 Japan Ice Hockey League season was the 25th season of the Japan Ice Hockey League. Six teams participated in the league, and the Oji Seishi Hockey won the championship.
Regular season
edit| Team | GP | W | L | T | GF | GA | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1. | Kokudo Keikaku | 30 | 22 | 8 | 0 | 156 | 77 | 44 |
| 2. | Oji Seishi Hockey | 30 | 20 | 8 | 2 | 145 | 87 | 42 |
| 3. | Jujo Ice Hockey Club | 30 | 16 | 13 | 1 | 106 | 102 | 33 |
| 4. | Sapporo Snow Brand | 30 | 14 | 14 | 2 | 103 | 99 | 30 |
| 5. | Seibu Tetsudo | 30 | 12 | 16 | 2 | 83 | 103 | 26 |
| 6. | Furukawa Ice Hockey Club | 30 | 2 | 27 | 1 | 51 | 176 | 5 |
Final
edit- Oji Seishi Hockey - Kokudo Keikaku 3:2 (4:2, 4:5, 2:4, 2:1 n.V., 4:3)