Kindergarten children exercise in a playground at Tokyo's Mizuho kindergarten on January 20, 2014, on the day of Daikan, which is believed to be Japan's coldest day of the year. Some 500 children at the kindergarten play and exercise without shirts every day of the year to keep healthy. AFP PHOTO/Yoshikazu TSUNO (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)
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AFP YOSHIKAZU TSUNO