Template:2018–19 Top League promotion/relegation matches


 * Top League sides Hino Red Dolphins and Munakata Sanix Blues won their matches to remain in the Top League for 2019–20.
 * Top League sides Coca-Cola Red Sparks and Toyota Industries Shuttles lost their matches and were relegated to the Top Challenge League for 2019.
 * Top Challenge League sides Mitsubishi Sagamihara DynaBoars and NTT DoCoMo Red Hurricanes won their matches to win promotion to the Top League for 2019–20.
 * Top Challenge League sides Kintetsu Liners and Kurita Water Gush lost their matches to remain in the Top Challenge League for 2019.

The matches played were: