I know, I've done some of it myself. But I've seen 3d modeling in other Japanese PVs, and it's about the same quality (one off the top of my head is in Gackt's Tsuki no Uta which is at least 5 years old and looks just like this one). It's just weird because of how big Japan is in the video game industry, and how big these pop acts are, and yet they can't get a decent modeler. I guess the market doesn't mind it too much if at all.