The ruling challenges the Dublin II Regulation, used by many EU countries to send asylum seekers back to Greece, despite the country's backlog of cases.
April is usually the peak of tourist season, but the natural disasters have resulted in cancellations of tours from Hong Kong, China, Russia, South Korea, Thailand and other countries that normally sendmany tourists to Japan.
It adds that tighter controls on immigration could reduce the numbers of migrant workers from developing countries who are able to send money home - a substantial source of income for many Caribbean, Central American and South Asian countries.