Voice acting in Japan is a separate profession that can get you quite a bit of fame. Voice acting in the English-speaking world is usually something second-rate actors do when they can’t earn enough money from live-action roles. So the quality of the voices provided is usually (but not always) higher in Japanese.

(As for the show itself, the action scenes are fairly well-done, but the plot is no great shakes. It’s entertaining so long as you don’t expect too much of it.)