Elsewhere in the gym, cardboard partitions separate the 233 evacuees’ sleeping areas and another sign instructs them to check their temperature each morning, then sterilise the thermometers.
The measures show what a thorny issue it is for Japan to deal with natural disasters in the time of coronavirus.
Japanese authorities have been warning local officials for months to include coronavirus measures in their disaster preparations. Residents have been urged to seek shelter with friends or relatives if possible to avoid overcrowding evacuation centres.
Kumomoto prefecture, where Yatsushiro is located, has had only 49 of Japan’s more than 20,000 coronavirus cases, according to public broadcaster NHK.
That compares with close to 7,000 in Tokyo, where cases are on the rise again among its 14 million residents.