Athletes competing at the postponed Tokyo Summer Games will undergo testing for the novel coronavirus every four to five days while staying at the Olympic village, sources with knowledge of the matter said Tuesday.

The Japanese government is set to announce a policy of testing each athlete once every 96 to 120 hours, in principle, on Wednesday, when the committee tasked with virus countermeasures for the games meets at the prime minister's office.

The government is set to release a revised itinerary for events up to and including the games, which are scheduled to open on July 23.

It is also expected to announce immigration measures for athletes in relation to the coronavirus pandemic. In principle, athletes will be able to enter from countries and regions whose citizens would otherwise be refused entry under infection control rules.