High Quality Content by WIKIPEDIA articles! The G1 Climax Tag League is a professional wrestling round-robin tag team tournament held by New Japan Pro Wrestling as a spin-off of the popular singles tournament, the G1 Climax. It was created in 1991 as the Super Grade Tag League, as a continuation of a regular tag team tournament held since 1980, gaining its current name in 1999. The winners of the tournament, assuming they do not already hold the belts, obtain #1 contendership to the IWGP Tag Team Championship.