How'd you get into J-pop, if I can call it that? I find this particular song insipid, but I can certainly see the appeal.
I love it myself and am looking forward to hearing the flip side. I don't know if it qualifies as 'J-pop', it just sounds like pop music that happens to be Japanese to me. Apart from Perfume and some of Kyary Pamyu Pamyu's stuff I'm not really into any other Japanese pop music as it stands I genuinely can't remember how I first got into them, might have been someone posting one of their song on here.
I don't know the first thing about J-pop or K-pop, but I once watched a lousy movie about a K-pop band that discovered a VHS tape containing a song that happened to be cursed, and every time they performed the song something would go terribly wrong. Again, a lousy movie, but I had the song stuck in my head for a week.