"Still Alive" in Japanese

"Still Alive" is the end song from Portal that I keep playing inside my head since it is so damn catchy. This one is a version sung in Japanese, and it's also cute.
Anyway, I've yet to play Portal, but I believe it'll be excellent. I've just completed Half-Life Ep 1, and I'm actually going through it again just to experience the developer's commentary. All I can say is that The Orange Box is excellent value and I'm having tons of fun with it.