answer:As long as you stay in Tokyo, you should be fine: “But the radiation situation in Japan’s financial heart, Tokyo, is better than Hong Kong, and hardly higher than New York or London, according to Bloomberg. According to the most recent data, here’s how the cities match up: * UK annual average – 0.251 microsieverts/hour * Hong Kong – 0.14 microsieverts/hour * Tokyo – 0.109 microsieverts/hour * New York – 0.095 microsieverts/hour * London – 0.08 microsieverts” Source