In this July 31, 2021, file photo, passengers wearing face masks to help curb the spread of the coronavirus get on board a west-bound bullet train at Tokyo Station in Tokyo. Outside the Olympic bubble, fueled by the more contagious delta variant, infections in Tokyo have logged new daily records and nearly tripled in the first week after the Games opened on July 23. Japanese officials say the surge is unrelated to the Olympics. (Photo by Kantaro Komiya/AP Photo/File)





A sunflower with seeds removed to create a smiley face pictured in a field on a hot summer day on July 31, 2021 in Kasaoka, Japan. The Kasaoka Bay Farm sunflower festival is held through mid-August as approximately one million sunflowers are in full bloom in the fields. (Photo by Buddhika Weerasinghe/Getty Images)





A giant statue of Japanese Olympic table-tennis player Kasumi Ishikawa is displayed outside the Fuji TV headquarters on July 30, 2021 in Tokyo, Japan. Japans Prime Minister Yoshihide Suga claimed on Thursday that there is no link between the recent surge in the number of coronavirus infections in Japan and the Tokyo Olympics, which is approaching the end of its first week. Tokyo has seen day-on-day record increases in Covid-19 infection rates over the last three days causing concern amongst officials in Tokyo. (Photo by Carl Court/Getty Images)





The Olympic Stadium is seen from Shibuya Sky observation deck in Tokyo on August 1, 2021. (Photo by Philip Fong/AFP Photo)





In this August 1, 2021, file photo, Olympic volunteer Reimi Kusunoki holds up a sign at the Enoshima yacht harbor during the 2020 Summer Olympics in Fujisawa, Japan. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (Photo by Gregorio Borgia/AP Photo/File)





People wearing face masks to help curb the spread of the coronavirus cross an intersection in Tokyo Thursday, August 5, 2021. Tokyo reported 5,042 new daily coronavirus cases on Thursday, hitting a record since the pandemic began as the infections surge in the Japanese capital hosting the Olympics. (Photo by Kantaro Komiya/AP Photo)





A man films the the Sports Climbing venue from a public walkway at Aomi Urban Sports Park at the Tokyo 2020 Olympic Games, in Tokyo, Japan on August 3, 2021. (Photo by Kevin Coombs/Reuters)





A child prays in front of the cenotaph dedicated to the victims of the atomic bombing at the Hiroshima Peace Memorial Park in Hiroshima, western Japan Friday, August 6, 2021. Hiroshima on Friday marked the 76th anniversary of the world's first atomic bombing of the city. (Photo by Kyodo News via AP Photo)





Rescuers papare stretchers at Soshigaya Okura Station after stabbing on a commuter train, in Tokyo Friday, August 6, 2021. A man with a knife stabbed passengers on a commuter train Friday and was arrested by police after fleeing, fire department officials and news reports said. (Photo by Kyodo News via AP Photo)





People wearing protective masks, amid the coronavirus disease (COVID-19) outbreak, hold an umbrella in the rain as they make their way on a crosswalk in Tokyo, Japan, August 7, 2021. (Photo by Kim Kyung-Hoon/Reuters)





A salesman walks through an empty electronics store showroom as televisions broadcast the gold medal baseball game between Japan and the United States at the 2020 Summer Olympics, Saturday, August 7, 2021, in Tokyo. (Photo by AP Photo)





Runners run at the Susukino district while competing in the women's marathon final during the Tokyo 2020 Olympic Games in Sapporo on August 7, 2021. (Photo by Pool via AFP Photo)





Supporters hold signs and cheer for the athletes in the women's marathon in Sapporo Odori Park, Sapporo, Japan on August 7, 2021. (Photo by Kim Hong-Ji/Reuters)





Kazunori Takishima, dressed in an aikido uniform, watches the Tokyo 2020 Olympics closing ceremony together with customers, at his guest house in Tokyo, Japan on August 8, 2021. (Photo by Androniki Christodoulou/Reuters)





People gather around the National Stadium to watch the firework display launched during the closing ceremony of the Tokyo Olympics in Tokyo, Japan, Sunday, August 8, 2021. When the Tokyo Olympics began during a worsening pandemic, the majority of the host nation was in opposition, with Emperor Naruhito dropping the word “celebrating” from his opening declaration of welcome. But once the Games got underway and local media switched to covering Japanese athletes' “medal rush”, many were won over. (Photo by Kyodo News via AP Photo)





A member of staff takes photographs of Olympics rings being dismantled in Odaiba area on August 11, 2021 in Tokyo, Japan. As the Olympics gives way to the Paralympics, some of the purpose-built venues are either being dismantled or altered. The Tokyo Paralympics is due to run from August 24th to September 5th and is expected to face the same coronavirus-related restrictions as the Olympics. (Photo by Yuichi Yamazaki/Getty Images)





A woman wearing a face mask to help protect against the spread of the coronavirus walks under the scorching sun Wednesday, August 11, 2021, in Tokyo, Japan. (Photo by Eugene Hoshiko/AP Photo)





People holding umbrella make their way through heavy rain in Fukuoka, western Japan, Thursday, August 12, 2021. Torrential rain pounding southwestern Japan has triggered a mudslide and swallowed four people in Nagasaki and threatened the region with the risk of floods and more landslides, officials said Friday. (Photo by Kyodo News via AP Photo)





Firefighters carry stranded residents on boat in a road flooded by heavy rain in Kurume, Fukuoka prefecture, western Japan, Saturday, August 14, 2021. Torrential rain pounding southwestern Japan triggered a mudslide early Friday that swallowed some people and was threatening to cause flooding and more landslides in the region. (Photo by Kyodo News via AP Photo)





People wade through a road flooded by heavy rain in Kurume, Fukuoka prefecture, western Japan, Saturday, August 14, 2021. (Photo by Kyodo News via AP Photo)