Japan floods strand thousands as record rain disrupts Tokyo transport

Record-breaking rainfall in Japan’s Chiba Prefecture has provided a stark example of how extreme weather can disrupt a journey even when flights themselves continue to operate.

More than 360mm of rain fell in parts of Chiba in 24 hours, while Chiba City recorded 115mm in a single hour. Flooding and landslides disrupted roads and railways, cut power to tens of thousands of households, and prompted Japan’s highest-level heavy rain warning. At least six people have died, according to reports, while around 7,000 travellers were stranded overnight at Narita International Airport.

Flights from Narita were broadly expected to operate, but cancelled trains and closed roads severed the airport’s connections with Tokyo. Thousands of passengers therefore faced an unexpected overnight stay despite their flights remaining scheduled.

For insurers, the main exposure is likely to sit in disruption-related claims, including travel delays, extra accommodation and transport costs, missed connections and trip interruption. More severe cases may also bring medical or evacuation costs where flooding leaves travellers stranded or cuts off access to accommodation.

It also puts greater weight on the detail of policy wording around weather disruption, alternative transport, abandonment, and known events. In particular, the timing of a purchase can become material: cover taken out after warnings or a developing weather event may not respond in the same way as cover arranged beforehand.

This comes just days after Typhoon Dolphin saw heavy rain in Japan’s Okinawa island and disrupted travel in China, where more than one million were evacuated.