Pretty sure emergency mobile broadcasts are included (at least by gov agencies) but you know what happens with these things that are only used for emergencies:
“It’s annoying can’t I turn it off?”
That’s why I still think the more methods the better. It’s probably one of the few reasons I’m okay with being bombarded with messages (not in jp, but literally got 2 earthquake warnings yesterday).
And I’ll be sure to let them know that I use windower add-ons and DAT mods when playing FF11. Maybe they’ll ban my PS2/PlayOnline from any future updates?