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Qualification Summary
Each National Olympic Committee can enter a maximum of 8 competitors (8 women). Should a nation qualify a team of 8 athletes they will be eligible to compete in the duet event. As hosts, Japan was given the maximum quota to compete. The remaining quotas will be decided at various events, specifically the 2019 World Aquatics Championships, continental qualifiers and the 2021 Olympic Games Artistic Swimming Qualifying Event.
Qualified Nations
Qualification events are listed in hierarchical order.
Women’s Team
| Qualification Event | Places | Qualified Nations |
|---|---|---|
| Host Nation/Asian Qualifier | 1 |  Japan |
| 2019 European Champions Cup | 1 |  Russia |
| 2019 World Aquatic Championships African and Oceania Qualifier |
2 |  Australia Egypt |
| 2019 Pan American Games | 1 |  Canada |
| 2019 World Aquatic Championships | 2 |  China Ukraine |
| 2021 Olympic Games Qualifying Event | 3 |
Women’s Duet
| Qualification Event | Places | Qualified Nations |
|---|---|---|
| Nations Qualified in Team Event | 10 | Australia Canada China Egypt Japan Russia Ukraine |
| 2019 European Champions Cup | 1 |  Spain |
| 2019 World Aquatic Championships African, Asian and Oceania Qualifier |
2* |  Kazakhstan New Zealand South Africa
|
| 2019 Pan American Games | 1 |  Mexico |
| 2021 Olympic Games Qualifying Event | 8* |
* New Zealand declined the quota, as no other Oceania nations are eligible the quota was redistributed to the 2021 qualifying event.