1990–91 Japan Ice Hockey League season

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.

Final

 * Oji Seishi Hockey - Kokudo Keikaku 3:2 (4:2, 4:5, 2:4, 2:1 n.V., 4:3)