Weather
Postpone or reroute coastal and mountain excursions during the Apr 1–2 heavy rain window; check JMA bulletins for area-specific advisories before travel.
JMA bulletins on Mar 31 warn of high waves and avalanche/landslide risk in nearby prefectures, and the 7-day forecast shows 100% rain probability on Apr 1–2.
Safety/Preparedness
Register with Tokyo's multilingual 'KitaconDX' and download the TOKYO Disaster Action Guide & Map so you can receive real-time shelter and evacuation information if needed.
Tokyo Metropolitan Government announced multilingual operation of KitaconDX and publication of an electronic TOKYO Disaster Action Guide & Map to support foreign visitors.