I would dominate everything.
Actually the final stage of the japanese one looks very difficult, due to the time limit. Back when I rock climbed on a regular basis, I figured I could beat most of the more difficult obstacles on stage 2, but probably not back to back.
I would sure hope I could beat stage 1, but I wouldn't put it past myself to just eff up on something silly.
I'm sure the whole thing is harder than it looks. I would love to try it, but I'm not gonna train and go through whatever it takes to be selected, so eff it.