Japan's Emperor Emeritus Akihito and Empress Emerita Michiko wearing face masks arrive at their temporary Takanawa Imperial Residence by car, in Tokyo Saturday, April 4, 2020. (Kyodo News via AP)

Japan's Emperor Emeritus Akihito and Empress Emerita Michiko wearing face masks arrive at their temporary Takanawa Imperial Residence by car, in Tokyo Saturday, April 4, 2020. (Kyodo News via AP)