The Japan Meteorological Agency has a website for foreigners that provides information on heavy rain, typhoons, tsunamis, etc!

This is the Japan Meteorological Agency's website for foreigners.
Information on heavy rain, typhoons, tsunamis, etc. can be viewed in 14 languages.

Information on weather (heavy rain, typhoons, etc.) and disasters (tsunamis, earthquakes, etc.) can be viewed.
The website is available in 14 languages (Japanese, English, Chinese (simplified and traditional), Korean, Spanish, Portuguese, Indonesian, Vietnamese, Tagalog (Filipino), Thai, Nepali, Khmer, Burmese, and Mongolian).

↓Please take a look!