As of March 21, 2011, Immigration and Customs Enforcement, otherwise known as ICE, has temporarily stopped all removal of Japanese nationals from the United States. ICE also states that they will provide updates as the situation develops.
ICE of course is reacting to the terrible earthquake and tsunami that recently hit Japan. ICE also took the same action in the beginning of 2010 for Haitian nationals when there was a disaster in Haiti. At that time ICE stopped removal of all Haitian nationals. However, recently there are news developments that Haitian nationals with severe criminal convictions in the U.S. are being sent back to Haiti. As a result, we can keep in mind that the suspension of removal of Japanese nationals is possibly only temporary.