For the team competitions, the best ranked NOC in each of the five continental championships, with the exception of the host country Japan, qualified. The remaining NOCs are able to qualify for the two highest-ranked spots at the 2019 World Aquatics Championships and the three highest-ranked spots at the Olympic Qualification Tournament. For the duet, the best ranked NOC in each of the five continental championships that did not have a qualified team is to be assured of a secured spot, while the other seven top-ranked NOCs are to be selected through the Olympic Qualification Tournament.