Ireland's athletes for Tokyo 2020 Olympic Games arrive at Narita international airport in Narita, east of Tokyo, Thursday, July 1, 2021. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. The games begin July 23, with organizers determined they will go on, even if stadiums and arenas reduce the number of spectators.(Kyodo News via AP)

A support team member is seen in almost deserted spectators seats during an athletics test event for Tokyo 2020 Olympic Games at the National Stadium in Tokyo Sunday, May 9, 2021. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. The games begin July 23, with organizers determined they will go on, even with a reduced number of spectators or possibly none at all.(AP Photo/Shuji Kajiyama)

People wearing protective masks wait at a crosswalk as an electric display in the background shows 17 days to Tokyo 2020 Olympics Tuesday, July 6, 2021, in Tokyo. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. The games begin July 23, with organizers determined they will go on, even with a reduced number of spectators or possibly none at all. (AP Photo/Kiichiro Sato)

Tokyo Metropolitan Government employees rest after receiving the Moderna's COVID-19 vaccine shot at a newly opened vaccination center at their government building Thursday, July 1, 2021, in Tokyo. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. While Japan has made remarkable progress to vaccinate its population against COVID-19, the drive is losing steam because of supply shortages.(AP Photo/Eugene Hoshiko)

U.S. boxing team for Tokyo 2020 Olympic Games, wearing face mask, arrive at Narita international airport in Narita, east of Tokyo, Thursday, July 1, 2021. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. The games begin July 23, with organizers determined they will go on, even with a reduced number of spectators or possibly none at all.(Kyodo News via AP)

A Tokyo Metropolitan Government employee takes the Moderna's COVID-19 vaccine shot at a newly opened vaccination center at the local government building, Thursday, July 1, 2021, in Tokyo. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. While Japan has made remarkable progress to vaccinate its population against COVID-19, the drive is losing steam because of supply shortages.(AP Photo/Eugene Hoshiko)

A German athlete, wearing face mask, walks past the Olympic rings display on their arrival at Haneda airport in Tokyo, Thursday, July 1, 2021. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. The games begin July 23, with organizers determined they will go on, even with a reduced number of spectators or possibly none at all.(Kyodo News via AP)

FILE - In this June 20, 2021, file photo, members of Uganda's Olympic team prepare to leave for Osaka, at Narita Airport in Narita, near Tokyo. With tens of thousands of visitors coming to a country that is only 13.8 percent fully vaccinated, gaps in border controls have emerged, highlighted by the discovery of infections among the newly arrived team from Uganda, with positive tests for the highly contagious delta variant.(Sadayuki Goto/Kyodo News via AP, File)

FILE - In this June 28, 2021, file photo, Japanese Prime Minister Yoshihide Suga, center, stands by a remotely-controlled guide robot at Haneda international airport in Tokyo. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. Amid the criticism, Suga went to Tokyo’s Haneda international airport June 28 to inspect virus testing for arrivals. He vowed to ensure appropriate border controls as a growing number of Olympic and Paralympic athletes, officials and media begin entering Japan for the games.(Kyodo News via AP, File)

A support team watch an athletics test event for Tokyo 2020 Paralympics Games at the National Stadium in Tokyo on Tuesday, May 11, 2021. The pressure of hosting an Olympics during a still-active pandemic is beginning to show in Japan. The games begin July 23, with organizers determined they will go on, even with a reduced number of spectators or possibly none at all.(AP Photo/Shuji Kajiyama)