Heavy rain expected Apr 1–2 (100% chance) with a risk of travel delays and localized flooding in low-lying areas in and around Tokyo.
Japan Meteorological Agency issued bulletins on Mar 31 warning of high waves (Shizuoka), snowmelt-related landslide and dense fog risk (Nagano) and other regional hazards these can affect coastal travel, mountain roads, and visibility.
Government action and recent large demonstrations: Tokyo-area authorities published new multilingual systems and maps for stranded visitors a Mainichi article notes a large protest on Mar 25 — monitor for demonstrations and official shelter guidance.
