Japan competed at the 2022 World Aquatics Championships in Budapest, Hungary from 18 June to 3 July. 58 competitors took part in all 5 sports held at the championships; artistic swimming, open water swimming, swimming, diving, and water polo.
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Japan entered 13 artistic swimmers.
Japan entered 9 divers.
Japan entered 7 open water swimmers ( 3 male and 4 female)
Japan entered 18 swimmers.