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20181207KW___0025700010 ©Kyodo/MAXPPP - 07/12/2018 ; Japanese Princess Mako, the eldest granddaughter of Emperor Akihito, releases a duck as foreign ambassadors to Japan are invited to an event to introduce traditional Japanese duck hunting at the Shinhama Imperial Wild Duck Preserve in Ichikawa, Chiba Prefecture, on Dec. 7, 2018.