In Japan, letting a sumo wrestler make your baby cry is considered good luck. One of the coolest fun facts about Japan: they have a ritual where sumo wrestlers make babies cry. Sounds like a dream for me, but a nightmare for my parents. However, the ritual is said to bring good luck. The Naki Sumo is a 400-year-old Japanese ritual where babies engage in a baby-cry sumo: two sumo wrestlers face each other carrying a baby each. The sumo wrestlers will try to make the babies cry, and the child that cries first or the loudest wins.
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Sumo wrestlers often make babies cry for good luck. This is based on the Japanese belief that if a sumo wrestler can make a baby cry, then that person will lead a healthy life.