A woman wearing a face mask to help curb the spread of the coronavirus walks by an electronic stock board of a securities firm in Tokyo, Wednesday, December 9, 2020. Asian shares logged strong gains on Wednesday after another round of record highs for major indexes on Wall Street. (Photo by Koji Sasahara/AP Photo)





A woman wearing a protective mask to help curb the spread of the coronavirus walks in Tokyo, Thursday, December 17, 2020. The Japanese capital confirmed more than 800 new coronavirus cases on Thursday. (Photo by Eugene Hoshiko/AP Photo)





Tokyo Gov. Yuriko Koike speaks during an interview with The Associated Press in Tokyo, Monday, December 14, 2020. The growing availability of coronavirus vaccines is a “ray of hope” for hosting the Olympics next summer, Koike said Monday as Japan struggles with a new surge in infections. (Photo by Koji Sasahara/AP Photo)





This picture taken on December 10, 2020 shows jellyfish swimming in an illuminated aquarium at Aqua Park Shinagawa in Tokyo. (Photo by Kazuhiro Nogi/AFP Photo)





Members of the media touch a moving model of a Tyrannosaurus, which uses a dinosaur-type human-operated mechanical suit called “Dino-Techne” by Japanese firm On-Art, during a media preview of the Dinoa Live Exhibition / Amazing Dinosaur Art Exhibition in the Shinjuku district of Tokyo on December 10, 2020. (Photo by Philip Fong/AFP Photo)





The Tokyo Tower is seen at night in the Japanese capital on December 14, 2020. (Photo by Charly Triballeau/AFP Photo)





Lego bricks weighing a total of 22 grams, which is equivalent to the amount of plastic that someone could eat in one month, are displayed on top of pieces of sushi rice in this illustration taken in Tokyo, Japan, November 11, 2020. People could be ingesting the equivalent of a credit card of plastic a week, a 2019 study by WWF International concluded, mainly in plastic-infused drinking water but also via food like shellfish, which tends to be eaten whole so the plastic in their digestive systems is also consumed. Reuters used the findings of the study to illustrate what this amount of plastic actually looks like over various periods of time. (Photo by Kim Kyung-Hoon/Reuters)





Various plastic goods weighing 1.3 kilograms, which is equivalent to the amount of plastic that someone could eat in five years, are displayed on a table in this illustration taken in Tokyo, Japan, November 12, 2020. (Photo by Kim Kyung-Hoon/Reuters)





Plastic dice weighing 21 grams combined, which is equivalent to the amount of plastic that someone could eat in one month, are displayed on a plate in this illustration taken in Tokyo, Japan, March 31, 2020. (Photo by Kim Kyung-Hoon/Reuters)





A boy looks at a ultraviolet sterilising machine cleaning library books he rents, amid the coronavirus disease (COVID-19) outbreak, at Narimasu library in Itabashi district in Tokyo, Japan, December 9, 2020. (Photo by Kim Kyung-Hoon/Reuters)





Shuhei Okawara, 30, owner of mask shop Kamenya Omote, holds a super-realistic face mask based on his real face, made by using 3D printing technology, in Tokyo, Japan on December 16, 2020. (Photo by Issei Kato/Reuters)





Masks based on real people's faces are diplayed at the Shuhei Okawara's mask shop Kamenya Omote in Tokyo, Japan on December 16, 2020. (Photo by Issei Kato/Reuters)





Shuhei Okawara, 30, owner of mask shop Kamenya Omote, shows off a mask based on a real person's face, in Tokyo, Japan on December 16, 2020. (Photo by Issei Kato/Reuters)





An African penguin swims in a large overhanging water tank called “Penguin in the sky” at Sunshine Aquarium in Tokyo on December 11, 2020. (Photo by Kazuhiro Nogi/AFP Photo)





People wearing face masks to protect against the spread of the coronavirus walk under decorations for new year through the alley leading to Asakusa Sensoji Buddhist temple in Tokyo, Wednesday, December 16, 2020. Tokyo has reported 678 new cases of the coronavirus, a high for the Japanese capital, as Japan now struggles with another surge in the virus. (Photo by Koji Sasahara/AP Photo)





People wearing face masks to protect against the spread of the coronavirus walk on the street in Tokyo, Monday, December 14, 2020. (Photo by Koji Sasahara/AP Photo)





People wearing protective masks wait for traffic signal to change on a crosswalk amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan, December 13, 2020. (Photo by Kim Kyung-Hoon/Reuters)





People wearing face masks to protect against the spread of the coronavirus reflected on the electronic board of a securities firm in Tokyo, Wednesday, Dec.16, 2020. Asian shares are higher Thursday, December 17, 2020 on hopes the U.S. Congress may finally deliver fresh aid to help businesses and families weather the pandemic. (Photo by Koji Sasahara/AP Photo)





In this December 11, 2020, file photo, people wearing face masks to help curb the spread of the coronavirus walk across an intersection in Tokyo. Tokyo reported 621 new COVID-19 cases Saturday, Dec. 12, setting a new high in the capital of Japan where a lack of government measures has triggered concerns about further upsurge during the holiday season. (Photo by Hiro Komae/AP Photo/File)





People remove snow on a street in Yuzawa in Niigata Prefecture, northwest of Tokyo, as heavy snow hits a wide area along the Sea of Japan coast on December 17, 2020. (Photo by Kyodo News/Reuters)