(1) Air Pollution
(3) Cold (Not to infect others.)
(4) No Need for Make-Up
(5) Looks Cute
(6) Hide Identify (For Celebrities)
(7) Hide Facial Expressions
Because of this, Jaoan may be experiencing one of the slowest Pandemic development. Unfortunately, people cannot wear masks when they drink or eat, That also may be the reason when there are clusters of infections at bars and Karaoke in Tokyo.