Chiba Prefecture Rainfall of 360 mm Sets Record Killing Eight Over Two Days
Record rainfall in Chiba Prefecture on August 13–14, 2026 killed eight people, prompted Self-Defense Force evacuations of roughly 4,000 people stranded near Soga Station, and left up to 7,000 travelers temporarily inside Narita Airport terminals overnight. Chiba City recorded more than 360 mm of rain in 24 hours, a new observation record, prompting Japan's Meteorological Agency to formally name the event 'Reiwa 8 August Chiba Heavy Rain.' All evacuation orders in the prefecture were lifted by 10:00 on August 15, and power outages had narrowed to approximately 120 premises in a single city ward.