Kozu elementary school students perform a traditional puppet drama in front of Kanjuro Kiritake, a Bunraku puppeteer, during a class by Kanjuro amid the coronavirus disease (COVID-19) outbreak, in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, touches a puppet in his study at his house in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kozu elementary school students touch puppets made by a Bunraku puppeteer Kanjuro Kiritake, amid the coronavirus disease (COVID-19) outbreak, at Kozu elementary school in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, poses for a photograph in front of the drawing of his late father with a puppet in his practice room at his house in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, gives lessons in traditional puppet drama to students, amid the coronavirus disease (COVID-19) outbreak, at Kozu elementary school in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, gives lessons in traditional puppet drama to students at Kozu elementary school, amid the coronavirus disease (COVID-19) outbreak, in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, poses for a photograph in front of the drawing of his late father with a puppet in his practice room, at his house in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, gives lessons in traditional puppet drama to students at Kozu elementary school, amid the coronavirus disease (COVID-19) outbreak, in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Ryuichi Morishita, a professor of clinical gene therapy at Osaka University, poses for a photograph during an interview with Reuters at his laboratory in Osaka, western Japan June 9, 2020. Picture taken June 9, 2020. REUTERS/Rocky Swift

A vendor, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), offers merchandise on an almost empty street in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A man, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), walks in front of Corona Hotel in Osaka, Japan March 14, 2020. Pictured taken, March 14, 2020. REUTERS/Edgard Garrido

A woman, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), walks on an almost empty street in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

An empty breakfast buffet is seen at the Osaka Corona Hotel in Osaka, Japan March 19, 2020. Picture taken March 19, 2020. REUTERS/Mari Saito

An empty breakfast buffet is seen at the Osaka Corona Hotel in Osaka, Japan March 19, 2020. Picture taken March 19, 2020. REUTERS/Mari Saito

A pig figurine wearing a surgical mask is displayed near the front desk of the Osaka Corona Hotel in Osaka, Japan March 19, 2020. Picture taken March 19, 2020. REUTERS/Mari Saito

The facade of Corona Hotel is pictured in Osaka, Japan March 14, 2020. Pictured taken, March 14, 2020. REUTERS/Edgard Garrido

Workers, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), receive tourists on an almost empty port in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A man, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), is pictured in front of Corona Hotel in Osaka, Japan March 14, 2020. Pictured taken, March 14, 2020. REUTERS/Edgard Garrido

The facade of Corona Hotel is pictured in Osaka, Japan March 14, 2020. Pictured taken, March 14, 2020. REUTERS/Edgard Garrido

A vendor, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), works at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A sign advertising discounted Corona beers is displayed at the front desk of the Osaka Corona Hotel in Osaka, Japan March 19, 2020. Picture taken March 19, 2020. REUTERS/Mari Saito

Employees, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), are pictured at a currency exchange booth at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), walks at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A man, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), passes in front of a hotel on an almost empty street in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A man, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), walks in front of Corona Hotel in Osaka, Japan March 14, 2020. Pictured taken, March 14, 2020. REUTERS/Edgard Garrido

A man, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), walks on an almost empty street in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

People, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), walk on an almost empty street in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A ship is pictured on an almost empty pier in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A worker, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), waits for receives tourists on an almost empty pier in the Dotonbori entertainment district of Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), passes in front of Korean Air's closed counter at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), carry his baggage at Kansai International Airport in Osaka, Japan, March 14, 2020. Pictured taken March 14, 2020. REUTERS/Edgard Garrido

Two vendors, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), offer food on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

Women, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), are pictured on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

People, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), walk on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A waitress, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), attends people inside an almost empty restaurant in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

People, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), walks in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A ship is pictured on an almost empty port in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

Seats are pictured in a restaurant on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A worker, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), receives tourists on an almost empty port in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A man, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), passes in front of a hotel on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

Workers, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), receive tourists on an almost empty port in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

People, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), walk on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A couple, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), walk on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A couple, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), walk on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A couple, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), take a selfie on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A vendor, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), offers merchandise on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A man, wearing a protective mask following an outbreak of the coronavirus disease (COVID-19), holds an umbrella on an almost empty street in the Dotonbori amusement district of Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), passes in front of a post of money exchange at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

An employee, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), works at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

Employes, wearing protective masks following an outbreak of the coronavirus disease (COVID-19), are pictured at the Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

An employee of Japan Airlines (JAL), wearing protective mask following an outbreak of the coronavirus disease (COVID-19), is pictured at Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), is seen inside a store at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), climbs the stairs at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

Passengers, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), check in at Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

An employee, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), passes in front of an All Nippon Airways (ANA) counter at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), passes in front of a Korean Air's closed counter at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), walks at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), is pictured at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

An employee of Japan Airlines (JAL), wearing protective mask following an outbreak of the coronavirus disease (COVID-19), scans the temperature to a passenger at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido

A passenger, wearing protective mask following an outbreak of the coronavirus disease (COVID-19), looks on her mobile phone at the almost empty Kansai International Airport in Osaka, Japan, March 14, 2020. REUTERS/Edgard Garrido