A shopper washes her hands using a mobile handwashing machine called 'WOSH', installed to prevent the spread of the coronavirus disease (COVID-19), in Ginza shopping district in Tokyo, Japan December 19, 2020. Shoppers washed their hands and sterilised their smartphones in the streets of Tokyo's posh Ginza district on Saturday using handwashing stations that a Japanese start-up hopes will revolutionise access to clean water and better hygiene. REUTERS/Issei Kato

A shopper washes her hands using a mobile handwashing machine called 'WOSH', installed to prevent the spread of the coronavirus disease (COVID-19), in Ginza shopping district in Tokyo, Japan December 19, 2020. WOTA Corp set up 20 of its WOSH machines near popular Ginza stores in an initiative with a district association aimed at encouraging shoppers to wash their hands to prevent the spread of the coronavirus. REUTERS/Issei Kato

Workers stand next to a mobile handwashing machine called 'WOSH', installed to prevent the spread of the coronavirus disease (COVID-19), in Ginza shopping district in Tokyo, Japan December 19, 2020. The machines don't require connection to running water and don't use fresh and waste water tanks. Instead they recycle the water through a three-stage process of membrane filtration, chlorine and deep ultraviolet irradiation. REUTERS/Issei Kato

Staff members try to install a mobile handwashing machine called 'WOSH', in an initiative aimed at encouraging shoppers to wash their hands to prevent the spread of the coronavirus disease (COVID-19), in Tokyo's Ginza shopping district in Tokyo, Japan December 19, 2020. They also have a device that cleans smartphones through 20-30 seconds of ultraviolet light exposure while users are washing their hands, since touching a dirty smartphone would otherwise negate their handwashing efforts. REUTERS/Issei Kato

Workers stand next to a mobile handwashing machine called 'WOSH', installed to prevent the spread of the coronavirus disease (COVID-19), in Ginza shopping district in Tokyo, Japan December 19, 2020. REUTERS/Issei Kato