It was then unified with the Wrestle Association R International Junior Heavyweight Tag Team Championship on October 12, 2007, to determine the inaugural Open the Twin Gate champions.

Dragongate had been using the WAR IJ Tag Team Championship since 2006, until 2007 when Masato Yoshino and Naruki Doi were declared interim Open the Twin Gate Champions after winning the first edition of the Summer Adventure Tag League tournament.

They later proposed a title unification match against IJ Tag Team Champions Kenichiro Arai and Taku Iwasa.

On October 12, during the Gate of Victory tour, Doi and Yoshino won the unification bout at Korakuen Hall, making them the inaugural champions.

The teams of Naruki Doi and Yamato, and Cima and Dragon Kid hold the most successful consecutive defenses with nine.