More than 60 percent of volunteers registered for next summer's Tokyo Olympic and Paralympic Games are worried about how anti-coronavirus measures will be implemented and the format of the events, according to a recent survey by the games' organizers.

In a multiple-answer question to volunteers at the venues and athletes' village on what concerns them about their upcoming role, those who were worried about the anti-virus steps and how the games will be held accounted for the largest number at 66.8 percent.

The online survey was conducted between July 1 and 21 on about 80,000 volunteers, of which approximately 26,000 responded.