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U.S Travelers: 1,515,000
All Travelers: 8,351,000

Travel alert: According to the State Dept., "while the situation at the Fukushima Daiichi plant remains serious and dynamic, the health and safety risks to areas beyond the 50 mile evacuation zone," including Tokyo, " are low and do not pose significant risks"

Photo: Koichi Kumagaya | Sebun Photo | Getty Images