As someone who lived in Japan at the time of the earthquake and saw what actually happened, I can tell you the media did in fact report it. It's all that was on western tv for three days. The problem is the media needs to sensationalize it, and when you do that the feeling only lasts for a couple days. Then people are so bombarded with the issue they don't care about it anymore. The media recognizes this and instantly moves onto the next big story.
The Japanese are very sensitive about bad news getting out. So their media does hide a fair share. However the claims in this report are absolutely unfounded and ridiculous. There are MANY international scientists still working with the Japanese making sure levels are safe.