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-promoted events; although the title has only changed hands twice at a non-NJPW event, it has been defended in several other promotions.
Hiroyoshi Tenzan currently holds the record for most reigns by an individual wrestler, with eleven. Tenzan's combined eleven reign lengths add up to 3310+ days, which is the most of any champion. At five reigns, the teams of Tenzan and Masahiro Chono, and Tenzan and Satoshi Kojima hold the record for most by a team. Tenzan and Chono's combined five reign lengths add up to 1,010 days (the most of any team). At 564 days, Bad Intentions' (Giant Bernard and Karl Anderson) only reign is the longest in the title's history. Keiji Mutoh and Shiro Koshinaka's only reign is the shortest, at six days. Currently, Bad Intentions' only reign has the most defenses, with ten. There are 14 reigns shared between 13 teams that are tied for the fewest successful defenses, with zero. Overall, there have been 76 reigns shared between 56 wrestlers.
- New Japan Pro Wrestling
- Champion history - History of the wrestlers who have held the belt.
- Title matches - Matches in which the title was defended.
- Champion gallery - A gallery of all champions.