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)