Iron Chef Japan, no question. Better chefs (ICA's Morimoto is arguably superior to his ICJ incarnation due to his additional years of experience, but Sakai, Chen, and Michiba kick the ass of anyone on ICA except Morimoto or Batali), better commentators (Alton Brown's not bad, but Hattori runs his own cooking school), better set, and a MUCH better Chairman (the less said about Mark Decascos, the better).