Im so sorry for the very late post on genpatsukun first of all :(
I thought the video was humorous and easy for everyone, especially children to understand about the radiation issues in Fukushima. I remember myself hardly understanding what the news on radiation was all about when it all happened. So, I guess the idea of using animation to briefly explain what's going on in the nuclear powerplant right at the moment is
nice and original.
But the thing is that I thought it isn't necessary for children to understand the entire issue, however there are more important points that needs to be covered.
I felt that only Japanese could have create such an animation like Genpatsukun.