Typhoon Dujuan has moved past parts of Japan after bringing torrential rain, strong winds and extensive transport disruption.

At one stage, evacuation instructions affected more than 1.6 million people. Some reports placed the number covered by evacuation notices closer to 1.9 million as warnings changed across different prefectures.

An evacuation instruction does not mean every person left their home. Japanese authorities issue notices according to local risk levels, and residents may move to a shelter, relocate to a safer building or take other action appropriate to their circumstances.

Japan’s public broadcaster reported two deaths and four people missing. Earlier information from the national Fire and Disaster Management Agency had confirmed one death in Miyazaki Prefecture, demonstrating how casualty figures changed as authorities received new reports.

The storm generated sustained winds of approximately 130 kilometres per hour, with reported gusts reaching about 194 kilometres per hour.

More than 50,000 customers experienced power interruptions. Hundreds of flights were cancelled, while rail operators suspended services on exposed routes.

Parts of the Izu island chain received the highest level of landslide warning as intense rainfall saturated hillsides.

Other locations in the Kanto region were placed under Level 4 warnings covering heavy rain, flooding and landslides.

Residents were urged to remain alert even after the storm moved away. Rivers can continue rising, damaged slopes can collapse and transport networks may take time to reopen.

The Japan Meteorological Agency later downgraded some of its most serious warnings as immediate conditions improved.

Downgrading a warning does not establish that every area is safe. Local instructions and official weather information remain more important than national summaries.

Dujuan arrived during an unusually strong El Niño pattern, which has contributed to warmer Pacific waters.

Warm ocean water can provide additional energy to tropical weather systems. Scientists must analyse individual storms before attributing their intensity to any single climate factor, but rising ocean temperatures increase the potential for heavier rainfall and stronger tropical cyclones.

For travellers, insurance coverage depends on when the policy was purchased and when the storm became a known event. Airlines and accommodation providers may also apply their own cancellation terms.

Residents and visitors should rely on the Japan Meteorological Agency, municipal authorities and transport operators for local updates rather than depending on social media posts.