People wearing face masks to help curb the spread of the coronavirus walk in Osaka, western Japan, Monday, April 5, 2021. Semi-emergency coronavirus measures began in Osaka and its neighboring prefecture in western Japan and another prefecture in the north Monday as Japan tries to minimize the economic impact to specific areas where infections are rising back less than four months before the Tokyo Olympics. (Photo by Kyodo News via AP Photo)





A woman shops at a supermarket in Shinjuku district of Tokyo on April 6, 2021. (Photo by Yuki Iwamura/AFP Photo)





A person with a protective mask to help curb the spread of the coronavirus wears samurai wig Tuesday, April 6, 2021, in Tokyo. The Japanese capital confirmed more than 390 new coronavirus cases on Tuesday. (Photo by Eugene Hoshiko/AP Photo)





A greyhound is seen wearing a dress at the “Interpets” international pet fair in Tokyo, Japan, 01 April 2021. As the coronavirus pandemic is limiting access from abroad, some 300 exhibitors based in Japan will present their products to business visitors and pet lovers until 04 April at the event, which is the largest international trade fair in the Japanese pet market. With the COVID-19 pandemic, pets are giving comfort to people who are spending more time home due to lockdowns and telework, boosting the pet products market. (Photo by Franck Robichon/EPA/EFE)





A visitor takes pictures of his dogs in a booth at the “Interpets” international pet fair in Tokyo, Japan, 01 April 2021. (Photo by Franck Robichon/EPA/EFE)





Dog groomers participate in a contest at the “Interpets” international pet fair in Tokyo, Japan, 01 April 2021. (Photo by Franck Robichon/EPA/EFE)





A pet dog sits inside a model of a coffee cup while its owner (not pictured) prepares to take photos at Interpets, an international fair for pet related products and services, in Tokyo, Japan, April 1, 2021. (Photo by Kim Kyung-Hoon/Reuters)





A dog is photographed in a booth at the “Interpets” international pet fair in Tokyo, Japan, 01 April 2021. (Photo by Franck Robichon/EPA/EFE)





Dog groomers participate in a contest at the “Interpets” international pet fair in Tokyo, Japan, 01 April 2021. (Photo by Franck Robichon/EPA/EFE)





A toy pooddle sits in a stroller at the “Interpets” international pet fair in Tokyo, Japan, 01 April 2021. (Photo by Franck Robichon/EPA/EFE)





A man wearing face masks to protect against the spread of the coronavirus walks in an underpass in Tokyo, Monday, April 5, 2021. (Photo by Koji Sasahara/AP Photo)





Employees wearing protective masks to help curb the spread of the coronavirus stand on a sidewalk Wednesday, April 7, 2021, in Tokyo. (Photo by Eugene Hoshiko/AP Photo)





Chef inside a small restaurant in Shinjuku is seen serving his costumers in Tokyo, Japan on April 8, 2021. (Photo by Stanislav Kogiku/SOPA Images/Rex Features/Shutterstock)





A man holds a placard during a demonstration outside of the Prime Minister's official residence on April 12, 2021 in Tokyo, Japan. The Japanese government is set to announce on April 13 its decision on the disposal of treated radiation-contaminated water accumulated at the property of Fukushima Daiichi Nuclear Power Plant complex. (Photo by Takashi Aoyama/Getty Images)





The founder of Bugaku and Samurai martial arts instructor Koshiro Minamoto demonstrates martial arts during an online class for Samurai experience in Tokyo, Japan, April 1, 2021. (Photo by Kim Kyung-Hoon/Reuters)





A man wearing a protective face mask amid the coronavirus disease (COVID-19) pandemic walks on a parking lot at a shopping mall in Tokyo, Japan, April 8, 2021. (Photo by Kim Kyung-Hoon/Reuters)





A countdown clock showing that 100 days are left until Tokyo 2020 Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic is reflected in a puddle in Tokyo, Japan, April 14, 2021. (Photo by Issei Kato/Reuters)





People wearing face masks to help curb the spread of the coronavirus walk at downtown Umeda in Osaka, western Japan, Sunday, April 4, 2021. Osaka prefecture issued a special warning Wednesday, April 7, 2021 over the rapid upsurge of the coronavirus cases that has put the area's medical systems on the brink of collapse, requesting the cancellation of the Olympic torch relay on public roads. (Photo by Chiaki Ueda/Kyodo News via AP Photo)





The Olympic Ring Monument installed on the water is seen through blossoming cherry trees in Tokyo, Japan, 13 April 2021, one day before the country starts its 100-day countdown to the Tokyo 2020 Olympic Games opening ceremony. The Summer Olympic Games, rescheduled from 2020 to 2021 because of the COVID-19 pandemic, are set to start on 23 July 2021. (Photo by Kimimasa Mayama/EPA/EFE)