Foreign participation included Delirious from Ring of Honor and Jyushin Thunder Liger from New Japan Pro-Wrestling.
Delirious was awarded place in the semifinal because original block A runner-up Kotaro Suzuki had to withdraw with a flu.
The first edition was on 4 October as part of an N-1 Victory 2020 show at Korakuen Hall in Bunkyō, Tokyo and contained 14 participants.
The winner of this rumble did not receive a GHC Junior Heavyweight Championship shot and the reigning champion, Kotaro Suzuki, participated.
The winner, Hayata, successfully defeated Atsushi Kotoge for the GHC Junior Heavyweight Championship the next night.