http://www.usatoday.com/news/world/2011-08-09-Japan-protectionism-housing-tsunami_n.htm
On April 15, Tokyo made a plea for international help with housing. By late May, it had rejected almost all the 322 foreign proposals, from 23 countries, that were listed for consideration.
Japanese officials say that the international contracts were rejected because domestic companies could supply the needed housing, Japanese officials couldn't deal with the English language bids, and they were concerned that the housing wouldn't meet Japanese standards for gas, plumbing, etc..