The IWGP Junior Heavyweight Tag Team Championship is a professional wrestling tag team championship owned by the New Japan Pro Wrestling (NJPW) promotion. "IWGP" is the acronym of NJPW's governing body, the International Wrestling Grand Prix. The title was introduced on August 8, 1998 at a NJPW live event. The IWGP Junior Heavyweight Tag Team Championship is not the only tag team title contested for in NJPW; the IWGP Tag Team Championship is also sanctioned by NJPW. According to NJPW's official website, the Junior Heavyweight Tag Team Championship is listed as an "IWGP Jr. Tag Class", while the IWGP Tag Team Championship is considered an "IWGP Heavy Weight Class". The title is contested for by junior heavyweight wrestlers; the weight-limit for the title is 100 kg (220 lb) per partner.
Title changes happen mostly at NJPW-promoted events. The Motor City Machine Guns (Alex Shelley and Chris Sabin), a Total Nonstop Action Wrestling (TNA) tag team, defeated then-reigning champions No Limit (Tetsuya Naito and Yujiro) on January 4, 2009 at Wrestle Kingdom III. Their reign lasted until July 5, 2009, when they were defeated by Apollo 55 (Prince Devitt and Ryusuke Taguchi) at a live event. During that time, they had three successful defenses; two were held by TNA due to a pre-existing relationship and an agreement with NJPW. Their first defense in TNA, a rematch against No Limit, occurred on March 31, 2009 at the tapings of their weekly television program TNA Impact!. On April 19, 2009, they made their second, and last, defense in TNA at the Lockdown pay-per-view event in a Three Way Tornado Tag Team Six Sides of Steel cage match against No Limit and The Latin American Xchange (Hernandez and Homicide).