The Global Junior Heavyweight League is a round-robin tournament held by Pro Wrestling NOAH. The purpose of the tournament is to determine the promotion's top junior heavyweight wrestler. It was originally designed to be an annual event starting in 2009, but the second tournament did not take place until 2015. The tournament is a two-block round-robin tournament, much like New Japan Pro Wrestling's Best of the Super Juniors tournament, in which each block's two highest scorers face off in the semi finals. A victory is worth two points, a draw was worth one, and a loss zero; each match has a thirty-minute time limit. Being a professional wrestling tournament the outcome of the matches and the tournament itself are not determined through pure athletic competition but through pre-determined outcomes to matches.
The tournament was formed in 2009 by Pro Wrestling NOAH. It was much like New Japan Pro Wrestling's Best of the Super Juniors tournament that is a round-robin style tournament where a wrestler scores points, in which each block's two highest scorers face off in the semi finals. A victory is worth two points, a draw was worth one, and a loss zero; each match has a thirty-minute time limit. The tournament was originally called the Junior Heavyweight League. The first ever tournament was for the vacant GHC Junior Heavyweight Championship after the champion KENTA was sidelined with a knee injury. The tournament include outside participants Delirious from Ring of Honor and Jushin Thunder Liger from New Japan Pro Wrestling. Delirious was awarded place in the semi final because original block A runner-up Kotaro Suzuki had to withdraw with a flu. Yoshinobu Kanemaru defeated Jushin Thunder Liger to win the tournament and the vacant GHC Junior Heavyweight Champion.
After six-years of break the tournament returned and was renamed to Global Junior Heavyweight League. It was again contested in round-robin tournament divided into a two-block system used in many other puroresu tournaments. In this format the top two scorers in each block advance to the semifinals, at which point single-elimination rules take effect. During the round-robin portion, a win is worth two points, a draw is worth one, and a loss zero; all matches have a 30-minute time limit, though in the past it has been twenty minutes. The winner of the tournament receives an opportunity to wrestle for the GHC Junior Heavyweight Championship. The number of wrestlers that took part of the tournament increased since the last time. In the 2015 tournament the GHC Junior Heavyweight Champion Taichi didn't took of the tournament. The winner of the tournament Daisuke Harada received his GHC Junior Heavyweight Championship shot at the Great Voyage 2015 in Yokohama. He would failed to capture the champion after the interference from Taichi's Suzuki-gun stablemates Taka Michinoku and El Desperado.