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SAO PAULO, BRAZIL - OCTOBER 28: Japanese Prince Akishino (L) and his wife Princess Kiko (R) plant a tree during their visit to the Monument to Japanese Immigration Pioneers at the Ibirapuera Park on October 28, 2015 in Sao Paulo, Brazil. (Photo by Vanessa Carvalho/Brazil Photo Press/LatinContent via Getty Images)

SAO PAULO, BRAZIL - OCTOBER 28:  Japanese Prince Akishino (L) and his wife Princess Kiko (R) plant a tree during their visit to the Monument to Japanese Immigration Pioneers at the Ibirapuera Park on October 28, 2015 in Sao Paulo, Brazil. (Photo by Vanessa Carvalho/Brazil Photo Press/LatinContent via Getty Images)