"IWGP" is the acronym of 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).

Their reign lasted until July 5, 2009, when they were defeated by Apollo 55 (Prince Devitt and Ryusuke Taguchi) at a live event.

[5] 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).

The inaugural champions were Shinjiro Otani and Tatsuhito Takaiwa, who defeated Dr. Wagner Jr. and Koji Kanemoto on August 8, 1998, in the final of a tournament.

They defeated Intergalactic Jet Setters (Kevin Knight and Kushida), Catch 2/2 (TJP and Francesco Akira), and Bullet Club War Dogs (Clark Connors and Drilla Moloney) in a Four-way Tokyo Terror ladder match at Wrestle Kingdom 19 to win the championships.