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A girl opens the door of a teacher's staff room at the Emporium kindergarten in Koriyama, west of the tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima prefecture

A girl opens the door of a teacher's staff room at the Emporium kindergarten in Koriyama, west of the tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima prefecture February 28, 2014. March 11 marks the third anniversary of the earthquake and tsunami that devastated Japan�s Fukushima Daiichi nuclear power plant. In Koriyama, a short drive from the crippled Fukushima nuclear plant, the city recommended shortly after the disaster that children up to two years old not spend more than 15 minutes outside each day. Those aged 3 to 5 should limit their outdoor time to 30 minutes or less. The limits were lifted last year, but many kindergartens and nursery schools continue to obey them even now in line with the wishes of worried parents. An annual survey by the Fukushima prefecture Board of Education found that children in Fukushima weighed more than the national average in virtually every age group. The cause seems to be a lack of exercise and outdoor activity. Picture taken February 28, 2014. REUTERS/Toru Hanai (JAPAN - Tags: DISASTER EDUCATION ENVIRONMENT HEALTH) ATTENTION EDITORS: PICTURE 09 OF 22 FOR PACKAGE 'FUKUSHIMA - FIGHTING AN INVISIBLE ENEMY'. TO FIND ALL IMAGES SEARCH 'KORIYAMA HANAI'

The children of Japan's Fukushima battle an invisible enemy

Yahoo NewsMarch 11, 2014

Though the strict safety limits for outdoor activity set after multiple meltdowns at the Fukushima Dai-ichi nuclear plant in 2011 have now been eased, parental worries and ingrained habit mean many children still stay inside.

And the impact, three years on, is now starting to show, with children experiencing falling strength, lack of coordination - some cannot even ride a bicycle - and emotional issues like shorter tempers, officials and educators say. (Reuters)

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