Prime Minister Fumio Kishida of Japan announced on Friday that he had instructed his cabinet to reclassify COVID-19, placing it in the same category as seasonal flu, rubella, and chickenpox in spring.
https://www.thegatewaypundit.com/2023/01/japan-declares-will-handle-covid-19-like-seasonal-flu/
That is correct. It's etiquette and common sense. Only stupid foreigners would be yapping on their phone on a train. "Hey there. Yeah, I'm just riding the train now and talking real loud to call attention to myself. Boy, I guess I haven't been in Japan long enough to realize that nobody here likes it when people call attention to themselves in public!"