The Tokyo Olympics and Paralympics organizing committee said Friday it has sold tickets for 42 percent of the venues' capacity and expects to see up to about 225,000 spectators per day in the Japanese capital if all ticket holders attend.

With the organizers set to draw up a plan this month on what to do regarding domestic spectators, Hidemasa Nakamura, the committee's games delivery officer, suggested the risk of having spectators could be limited, given that the number of ticket holders set to enter venues is estimated to be smaller than those visiting or commuting to the capital.

Speaking at a press conference, Nakamura said 70 percent of the tickets for events taking place in Tokyo and neighboring Chiba, Saitama and Kanagawa prefectures have been sold to people living in those areas.

The Japanese organizers and the International Olympic Committee have waited to decide on venue capacity for spectators in Japan after barring fans from overseas. However, medical experts have expressed concern that allowing fans could lead to the spread of the coronavirus as people travel to and from the venues.

On Friday, infectious disease expert Shigeru Omi, Japan's top COVID-19 adviser who has been critical of staging the Tokyo Games, told a parliamentary committee he will assess the risk of allowing spectators.

Omi, who heads a government subcommittee on the coronavirus, said the public will most likely be asked to follow anti-virus mitigation steps, including refraining from traveling to other prefectures, during the Olympics as they coincide with summer vacation.

With about 40 days to go before the Olympics opening ceremony, Tokyo has been under a state of emergency since late April to bring down the number of infections. Omi has said he plans to put together recommendations on staging the Olympics by June 20, the final day of the emergency.

Separately on Friday, Tokyo Gov. Yuriko Koike said a vaccination center will be set up at the metropolitan government building to inoculate officials and workers related to the Olympics.

About 2,500 shots will be administered per day starting June 18 to referees and staff working at games facilities including the athletes' village, Koike said.

The center will use Pfizer Inc. vaccine doses provided by the IOC for Japanese athletes and officials related to the games.