So say many angry tweets in Japan. They say the TV stations edited out his reference to radiation contamination.
I'm not convinced that the allegation is valid, but the TV stations did have a choice which part of the Emperor's speech they would highlight in the news segments and they didn't choose the reference.
The Emperor of Japan attended the ceremony held in the National Theater on March 11, 2012, even if he had undergone a heart surgery and was still recovering. He delivered the speech addressing all the three components of the disaster that struck Japan - earthquake, tsunami, and nuclear.
But except for those who attended the ceremony or watched it live, or those who read the speech in the paper, people in Japan wouldn't know by watching the TV news that the Emperor spoke about the radiation contamination as the result of the nuclear accident and that he recognized it as a difficult problem.
The Emperor spoke for about 6 minutes, so there is no way that the TV stations would report all of the speech in the short news segment (2 to 3 minutes at most). But they chose not to highlight the radiation contamination part.
Here's what the Emperor said in the ceremony (nuclear part), according to Asahi Shinbun (3/11/2012):
Further, this disaster [earthquake and tsunami] triggered a nuclear power plant accident. People had to evacuate from areas made dangerous by the nuclear accident, where they had lived and worked for many years. In order for them to go back and live safely there, we have a difficult problem of radiation contamination to overcome.
Several people were indignant that the TV stations edited the Emperor's words at all to fit into the short news segments. I tend to agree with them. It was a 6 minutes speech, in his own words (unlike PM Noda's cliches written by his speech writer), and you can see he was talking to the people who perished in the disaster (unlike Noda who simply read the prepared statement without looking up from the piece of paper, from what little I've seen that was reported). They should have aired it in its entirety, for those who couldn't see it live.
ANN (TV Asahi) has the entire speech on Youtube, with the viewer count at 4,371 as of now. Other videos of the event has only several hundred views.