The 10th was a midsummer day of over 30 degrees Celsius in Kitami City, Hokkaido.
Kitami City is instructing children to take physical education classes without wearing masks to prevent the risk of heat stroke.
It has been pointed out that there is a risk of not being able to breathe sufficiently or suffering from heat stroke when wearing a mask in a physical education class at school.
At a press conference, Mayor Naotaka Tsuji of Kitami City said, "A notice from the Sports Agency states that it is not necessary to wear a mask when exercising during a physical education class. I am instructing elementary and junior high schools in the city to do it. "
After that, he said, "Because it is a physical education class without a mask, it is important to take thorough measures against infectious diseases other than masks."