The emperor of Japan, during the annual Spring Garden Party that he hosts, talked to the governor of Miyagi Prefecture and asked him about the disaster debris. Depending on the newspaper you read, you would get a different idea on what the emperor may have said.
Not surprisingly, Tokyo Shinbun (4/19/2012) focused on the concern that the emperor expressed regarding the disaster debris disposal:
His Imperial Majesty talked about the disaster debris processing with Governor Murai [of Miyagi Prefecture], and said "There are dangerous substances in the debris, aren't there? Like asbestos? I hope you would take ample precaution in processing [the debris]", expressing his consideration for the health of the workers.
Surprisingly, Sankei Shinbun is the close second:
His Majesty asked Governor Yoshihiro Murai of disaster-affected Miyagi Prefecture, "There are dangerous substances in the debris, aren't there?" He continued, "I hope you would take ample precaution in processing [the debris]", showing his consideration.
Nikkei Shinbun's focus is not his concern for the dangerous substances in the debris but the success of wide-area disposal of the disaster debris:
His Majesty asked Governor Murai "How is the disaster debris?" The governor answered, "We are receiving the warm support from all over the country to accept the debris. We will try our best to process it quickly."
If you understand Japanese, the above quotes are taken from this blog, which also has a video clip from the news.
People may remember the emperor's speech during the memorial ceremony of the March 11, 2011, in which he spoke to the people who perished in the disaster and addressed the concern of radioactive contamination.