The IWGP Tag Team Championship (IWGPタッグ王座, IWGP taggu ōza) is a professional wrestlingworld tag team championship owned by the New Japan Pro-Wrestling (NJPW) promotion. "IWGP" is the acronym of the NJPW's governing body, the International Wrestling Grand Prix (インターナショナル・レスリング・グラン・プリ, intānashonaru resuringu guran puri). The title was introduced on December 12, 1985 at an NJPW live event.[1] The IWGP Tag Team Championship is one of two weight-specific tag team titles contested for in NJPW; the IWGP Junior Heavyweight Tag Team Championship is also sanctioned by NJPW.[2] According to NJPW's official website, the IWGP Tag Team Championship is considered the "IWGP Heavyweight [Tag] Class", while the Junior Heavyweight Tag Team Championship is listed as the "IWGP Jr. Tag Class".[2] Like most professional wrestling championships, the title is won via the result of a scripted match. Title changes usually happen at NJPW-promoted events; although the title has only changed hands twice at a non-NJPW event,[3] it has been defended in several other promotions.