Heh, I take it the singer was Megumi Hayashibara? lol. As far as jpop goes, she's one of my favourite singers. (not that I listen to jpop any more, but either way). You might like Happy Hardcore. Stuff by Dune, Visa, and Bang! is practically eurobeat + better music.
Ishkur's Guide To Electronic Music is considered a bible to people who listen to Electronic Music, lol.
Some of my favourite styles of music I consider fun, but absolutely terrible are: Italo-disco, Ghetto Tech/Anything under Booty Bass,
My favourite music that I consider actual good music: Trancecore, Every Gabber style in there, Electro/Electro Funk, Big Beat, Acid/Funky/Chemical breaks, Hip Hop/Turntablism/East And West Coast/Progressive and Abstract Hip Hop. Ragga and pretty much the entire jungle page minus Jump Up (Especially Oldschool. That stuff kicks SERIOUS ass). Well, hell, everything in the Hardcore page minus Gabber House and Happy Gabber and New Beat. Downtempo (everything on that page), Techno (minus latin), I only like a few Trance Genres though: Acid, the Psy group, Symphonic Trance (absolutely LOVE Brainbug), Hard Dance minus NRG, and as for House: Everything minus Anthem, Booty, Stupid, Speed Garage, Epic, Brit and Dark.
I've covered the entire Guide now. And I listen to and like a rather large majority of it, lol. Yay for weird music tastes.