In the space of the three months since they launched “It G Ma,” the rappers behind the track may have done more for Asian pop credibility worldwide than PSY’s gazillion views for “Gangnam Style” ever did. Not only does the quintet (Keith Ape, JayAllday and Okasian are Korean; Loota and Kohh are Japanese) rap with elan in the bass-heavy “trap” style, they do it in their native languages. By avoiding Asian cultural cliches, they demand to be judged on an even playing field. The respect commanded by the track among Western listeners shows they’ve pulled it off.