Any good J-Pop bands au artists for beginners?

I've been a diehard anime shabiki for a long time now so I sort of gained interest in Japanese muziki too. Really, I've only been listening to Kyary Pamyu Pamyu and VOCALOID, and I'd really like to try branching out my interests, so any suggestions? I'm a pretty big shabiki of muziki with a beat, techno music, dubstep music, basically anything that gets wewe pumped, but I'd be willing to try other things!