Dana doesn't pick anybody's music he just gives it the "ok" all the fighters in the ufc now chose their music. You can obviously tell as Matt Hughes went from American Badass by Kid Rock to Hank Williams Jr. I think it's just where it is a different culture in Japan and they have different feelings on entrances. Yoshida's theme against Cro Cop was the worst of the bunch though even Mirko was looking at him like "wtf". As for Wanderlei, he started coming out to Slaughterama by GWAR~! and for some reason switched to Sandstorm. But I guess your music doesn't have to be bad ass just appropriate, I mean Fedor has the best walking music in all MMA as far as I and Bas Rutten are concerned.