Japan competed at the 2022 World Aquatics Championships in Budapest, Hungary from 18 June to 3 July.

Japan entered 13 artistic swimmers.

[4] [5] Japan entered 7 open water swimmers[6] ( 3 male[7] and 4 female[8]) Japan entered 18 swimmers.

[9] [10] [11] The following is Japanese roster in the Water polo at the 2022 World Aquatics Championships – Men's tournament.

[12] Head coach: Yoshinori Shiota