BTW there is no law in Japan about shutter sound, makers are following the consensus by their own will (don’t want to be the only ones to not follow)
This is usually just a trivia, but in these cases it’s informative on what length makers feel obligated to go to protect that shutter sound part. Which is, not much in general.
If you use a foreign SIM card it won’t follow that rule, same for some of the capture modes, etc.