Qualification Summary
Each National Olympic Committee can enter a maximum of one team in each event (11 men and 11 women). As hosts, Japan will be given a spot to compete in each event. The remaining quotas will be decided through various events, specifically, the 2019 World League, the 2019 World Aquatics Championships, the Continental Championships and the Olympic Qualification Tournament.
Qualified Nations
Qualification events are listed in hierarchical order.
Men’s Tournament
| Qualification Event | Places | Qualified Nations |
|---|---|---|
| Host Nation | 1 |  Japan |
| 2019 World League | 1 | |
| 2019 World Aquatics Championships | 2 | |
| 2019 Pan American Games | 1 | |
| 2019 Asian Championships | 1 | |
| 2020 European Championships | 1 | |
| African Qualifier | 1 | |
| Oceania Qualifier | 1 | |
| Olympic Qualification Tournament | 3 |
Women’s Tournament
| Qualification Event | Places | Qualified Nations |
|---|---|---|
| Host Nation | 1 | Japan |
| 2019 World League | 1 |  United States |
| 2019 World Aquatics Championships | 1 | |
| 2019 Pan American Games | 1 | |
| 2019 Asian Championships | 1 | |
| 2020 European Championships | 1 | |
| African Qualifier | 1 | |
| Oceania Qualifier | 1 | |
| Olympic Qualification Tournament | 2 |