From Jiji Tsushin (4/17/2012):
70 Corporations positive on accepting the disaster debris, Minister of Economy Edano reported at the ministerial meeting
At the ministerial meeting on April 17 on the wide-area disposal of disaster debris, Yukio Edano, Minister of Economy, Trade and Industry reported that 70 corporations in the cement industry, the paper industry and others have responded positively to the request for cooperation in disposing the debris from the March 11, 2011 earthquake/tsunami.
This I think is the real deal that the national government has wanted all along. By going the corporate route - industries that use debris as fuel and raw material (ashes for the cement, for example) and the industrial waste management industry, the national government can bypass the municipalities who may have to deal with those pesky residents against accepting and burning the disaster debris at their municipal incineration facilities. The municipal governments will be relieved that it won't be their responsibility to ascertain safety.