It's stuck in my head! Thank the gods for the internet! All I did was turn on the TV and there was this cartoon I've never watched before, Teen Titans. I have a friend or two who seem to be fans. Anyway, there's this chase scene and this song was playing in the background. It's ska, but it's in Japanese! I have this big affection for music in different languages. I like it and I want to know who, what and where I can find it.
The World Wide Web to the rescue!
It took me a whopping 10 minutes, if that, to find out that it was Puffy Amiyumi and the song is called "K2G". I wasn't able to find an "official" video for the song, but I found a pretty neat Gerard Butler dedication video of his visit to Japan with the song. They disabled the embedded player so to watch it you'll have to click on the link.
Puffy Amiyumi - "K2G"
http://www.youtube.com/watch?v=0mmzYCoBmhY