The main problem the acces too Japanese entertainment is very restrictive. Their was a point where I was very intrested in Arashi , I tried too look them up but most things where blocked . Even subtitles where hard to come by. That's why I'm just listen casually too Japanese music.
Jpop would have been big if people had more acces too it. It definatly has it's charms, just like Kpop has it's own charms too.