Up to 10,000 Japanese fans will be permitted at Tokyo 2020 Olympic venues, despite warnings from health bosses.
Overseas spectators are already banned but organisers said domestic fans could attend providing crowds did not exceed 50% of a venue's capacity.
Fans will not be allowed to shout or speak loudly, and must wear face masks at all times while in venues.
The Olympics are scheduled to begin on 23 July, while the Paralympics follow a month later, from 24 August.
Spectator numbers for the Paralympics will be confirmed by 16 July, said a joint statement from the International Olympic Committee (IOC), the International Paralympic Committee (IPC), the Tokyo 2020 organising committee, the Tokyo metropolitan government and the government of Japan.