An official wearing a protective face mask, following the outbreak of the coronavirus disease (COVID-19), is seen during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

A woman wears a protective face mask following the outbreak of the coronavirus disease (COVID-19) as she tries to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

Officials struggle to light the Olympic Flame at the Olympic cauldron during the strong wind at the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi pfefecture, Japan March 20, 2020. REUTERS/Issei Kato

Officials wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

People wear protective face masks following the outbreak of the coronavirus disease (COVID-19) as they try to watch the Olympic cauldron during the Tokyo 2020 Olympic's Flame of Recovery tour at Ishinomaki Minamihama Tsunami Recovery Memorial Park in Ishinomaki, Miyagi prefecture, Japan March 20, 2020. REUTERS/Issei Kato

Abandoned buildings are seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Women wearing protective masks, following the outbreak of the coronavirus disease (COVID-19), place candles as they pay their respect to victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, in Iwaki, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

A Buddhist monk places a candle as he pays his respect to victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, in Iwaki, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Buddhist monks pay their respect to victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, in Iwaki, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

People, wearing protective masks following the outbreak of the coronavirus disease (COVID-19), place candles as they pay their respect to victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, in Iwaki, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

An abandoned garden is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

A geiger counter, measuring the radiation level of 0.275 Microsievert per hour, is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

An abandoned supermarket is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Big black plastic bags containing radiated soil are seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

An abandoned vending machine is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

An abandoned building is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Abandoned buildings are seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Abandoned buildings are seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Police officers take part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Police officers take part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Police officers take part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Police officers take part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

People pass next to a board with messages mourning the victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, at Ginza shopping district in Tokyo, Japan, March 11, 2020. REUTERS/Edgard Garrido

Policer officers take part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Flowers placed by policer officers are seen after a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Policer officers leave after taking part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

A woman reacts next to a board with messages mourning the victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, at Ginza shopping district in Tokyo, Japan, March 11, 2020. REUTERS/Edgard Garrido

People, wearing protective face masks following the outbreak of the coronavirus disease (COVID-19), take photos next to a board with messages mourning the victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, at Ginza shopping district in Tokyo, Japan, March 11, 2020. REUTERS/Edgard Garrido

Policer officers take part in a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis, in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

People, wearing protective face masks following the outbreak of the coronavirus disease (COVID-19), are seen next to a board with messages mourning the victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, at Ginza shopping district in Tokyo, Japan, March 11, 2020, that killed thousands and set off a nuclear crisis. REUTERS/Edgard Garrido

A man, wearing protective face mask following the outbreak of the coronavirus disease (COVID-19), is seen next to a board with messages mourning the victims of the March 11, 2011 earthquake and tsunami disaster that killed thousands and set off a nuclear crisis, at Ginza shopping district in Tokyo, Japan, March 11, 2020. REUTERS/Edgard Garrido

People attend a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Ginza shopping district in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Edgard Garrido

A woman prays during a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

People wearing protective face masks, following an outbreak of the coronavirus, attend a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, during a memorial service at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

People wearing protective face masks, following an outbreak of the coronavirus, attend a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, during a memorial service at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

People wearing protective face masks, following an outbreak of the coronavirus, attend a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, during a memorial service at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

People wearing protective face masks, following an outbreak of the coronavirus, attend a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

A man wearing protective face mask, following an outbreak of the coronavirus, attends a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

A woman wearing protective face mask, following an outbreak of the coronavirus, prays during a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

A woman wearing a protective face mask, following an outbreak of the coronavirus, prays before the start of a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

People wearing protective face masks, following an outbreak of the coronavirus, attend a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

People wearing protective face masks, following an outbreak of the coronavirus, wait for the start of a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

A man wearing a protective face mask, following an outbreak of the coronavirus, prays before the start of a memorial service preceding a moment of silence at 2:46 p.m. (0546 GMT), the time when the magnitude 9.0 earthquake struck off Japan's coast in 2011, at Hibiya Park in Tokyo, Japan, March 11, 2020, to mark the nine-year anniversary of the earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Stoyan Nenov

Police officers take part in a search operation for the remains of people who went missing after the March 11, 2011 earthquake and tsunami disaster in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Police officers take part in a search operation for the remains of people who went missing after the March 11, 2011 earthquake and tsunami disaster in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Police officers take part in a search operation for the remains of people who went missing after the March 11, 2011 earthquake and tsunami disaster in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Police officers take part in a search operation for the remains of people who went missing after the March 11, 2011 earthquake and tsunami disaster in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

A police officer takes part in a search operation for the remains of people who went missing after the March 11, 2011 earthquake and tsunami disaster in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha

Police officers take part in a search operation for the remains of people who went missing after the March 11, 2011 earthquake and tsunami disaster in Namie, Fukushima prefecture, Japan, March 11, 2020. REUTERS/Athit Perawongmetha