Key Facts
• September 12, 2025: Record-breaking rain caused flooding in Yokkaichi, Mie Prefecture.
• Underground parking lot “Kusunoki Parking” submerged; water level peaked at 5.10 meters.
• Basement 1 flooded up to 1.2 meters; Basement 2 completely submerged.
• Power outage halted drainage systems during the storm.
• September 13, 11:44 AM: Drainage operations began.
• September 16, morning: Flooding resolved after 4 days of drainage.
• September 16, 9:00 AM: Water depth reduced to 0.29 meters.
• Over 260 vehicles damaged, including 100 in Basement 2.
• Ministry of Land, Infrastructure, Transport and Tourism (MLIT) initiated damage investigation.
Summary
A record-breaking downpour on September 12, 2025, caused severe flooding in Yokkaichi, Mie Prefecture, submerging the “Kusunoki Parking” underground facility. The water level reached a staggering 5.10 meters, with Basement 1 experiencing up to 1.2 meters of flooding and Basement 2 completely underwater. A power outage during the storm rendered drainage systems inoperable. Drainage efforts began on September 13 and took four days to fully resolve the flooding by the morning of September 16. By 9:00 AM that day, water levels had dropped to 0.29 meters, allowing the Ministry of Land, Infrastructure, Transport and Tourism to commence damage assessments. Over 260 vehicles, including 100 in Basement 2, were affected. The incident highlights the vulnerability of infrastructure to extreme weather events.
