Germany only got a disaster prevention app (NINA) after the 2021 floods in Nordrhein-Westfalen. Japan does have some civil protection features through its public broadcasting to my knowledge, but I suppose it works like here, that there are redundant firms offering the same service, such as the app of the German Weather Service (DWD), partially at least for disaster prevention services being underfunded.
Germany only got a disaster prevention app (NINA) after the 2021 floods in Nordrhein-Westfalen. Japan does have some civil protection features through its public broadcasting to my knowledge, but I suppose it works like here, that there are redundant firms offering the same service, such as the app of the German Weather Service (DWD), partially at least for disaster prevention services being underfunded.