Here are a few apps that can come in handy in various situations:
Safety tips
Notifications will be sent to your mobile phone when a hazardous situation occurs such as natural disasters (heavy rains, typhoons, earthquakes, tsunamis, etc.) in Japan.
Android:https://play.google.com/store/apps/details?id=jp.co.rcsc.safetyTips.android&hl=ja
iPhone: ttps://apps.apple.com/jp/app/safety-tips/id858357174
NHK WORLD-JAPAN
You can watch news and programs provided by NHK-WORLD JAPAN in multiple languages by downloading this app to your mobile phone.
Android::https://play.google.com/store/apps/details?id=jp.or.nhk.nhkworld.tv&hl=ja
iPhone: https://apps.apple.com/jp/app/nhk-world-tv/id350732480
NHK News, bōsai – News and disaster information
VoiceTra – Multilingual voice translation app
Zenkoku hinanjo gaido –Guide to emergency evacuation shelters
San āru – Garbage separation app