The IWGP Tag Team Championship is a professional wrestling 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. The title was introduced on December 12, 1985 at a NJPW live event. The IWGP Tag Team Championship is not the only tag team title contested for in NJPW; the IWGP Junior Heavyweight Tag Team Championship is also sanctioned by NJPW. According to NJPW's official website, the IWGP Tag Team Championship is considered an "IWGP Heavy Weight Class", while the Junior Heavyweight Tag Team Championship is listed as an "IWGP Jr. Tag Class". Like most professional wrestling championships, the title is won via the result of a scripted match. Title changes usually happen at NJPW-p