Aoki absolutely schooled a top-10 lightweight in Kawajiri. Who knows what his next move/fight will be, though. There's absolutely no reason for Melendez to want a rematch (except money).
It seems to me that Aoki wont be satisfied to sit in Japan much longer and fight scrubs, though. I think he's seriously wanting to start fighting the American lightweights as evidenced by the lack of tights. He's preparing himself. I think one or two more wins without the tights and he's going to jump continents.