 Doi became one half of the ROH World Tag Team Champions on March 3, 2007, with Shingo, beating The Briscoe Brothers in Liverpool, England.The two would lose the title back to the Briscoes at "All Star Extravaganza III" on March 30.In June 2008, he and Masato Yoshino joined Milano Collection A.T. and Puma to form Team Japan in that year's TNA World X Cup Tournament and together they had matches against members of the other teams, losing each match.