A group you've probably never heard of but if you like strange but catchy Shibuya-kei type music, you'll probably like this. If you go looking for their albums, try out the domestically released 4n5 or imported Seizen Setsu albums.
"Inspired by a wide array of influences, including new wave, techno-pop, ska, and lounge, Hi-Posi is one in a long list of Japanese artists able to distill seemingly disparate influences into something uniquely Japanese." - Nippop.com