Hmmm, if i'm correct, the one with all the people smoking weed in the beggining, and they all got better weapons, right?
If i'm not mistaken its osaka. My favorite arc, the art is fucking incredible in that one.
Because the "kyoto" arc is i THINK when that one guy mows down like 100's of people in downtown kyoto. He kills the psychics, the kung-fu guy, and like everyone is "Gantzed" because of him. Then they go fight dinosaurs or something. That was kinda "internet lulz" but not really good.
-Following that is Vampire shit i never understood.