Voices around Japan questioning the wisdom of pushing ahead with the Tokyo Olympics during a pandemic have grown louder in recent weeks as the nation experiences a surge in infections.

Several areas are under a state of emergency that will last until the end of May and recent polls suggest public sentiment is against hosting the event as scheduled.

As anti-Olympic protesters gathered for a demonstration near Tokyo's National Stadium on Sunday, where an athletics test event was being held, World Athletics President Sebastian Coe was resolute that the show must go on in July.