TOKYO, JAPAN / RankWire.AI / – On Monday, Typhoon Dujuan brought heavy rainfall and strong winds to eastern Japan, leading to emergency landslide warnings and widespread disruptions in travel. The Japan Meteorological Agency issued its highest landslide alert for Oshima in the Izu Islands shortly after midday. Some parts of the island chain received over 500 millimeters of rain, while Chiba Prefecture recorded more than 300 millimeters from Saturday through early Monday afternoon. Authorities issued warnings to residents about flooding, swollen rivers, landslides, and dangerous coastal conditions.
At noon, Dujuan was moving north-northeast over waters west of Hachijojima, maintaining a broad storm-force wind zone. Meteorologists tracked the system as it headed toward the Izu Islands and the Kanto region. The typhoon was forecasted to pass near Kanto later Monday as it accelerated northeastward. Officials issued warnings of violent winds, rough seas, and additional heavy rainfall along eastern Pacific coastal areas. They also monitored the potential for linear rain bands, which can produce intense localized downpours within a short period.
The storm caused damage and operational shutdowns across several prefectures. The Ministry of Land, Infrastructure, Transport and Tourism reported three landslides in Chiba by 2 p.m. One residence was destroyed, and another sustained partial damage. Miyazaki also experienced two landslides, resulting in one death and one injury. Heavy rain led to the closure of 32 sections across six expressways and three national roads. Flooding and fallen trees blocked 16 prefectural road segments in Ibaraki, Saitama, and Chiba.
Flights and Public Transit Suffer Disruptions Due to Heavy Rain
By 11 a.m., the ministry’s update indicated that airlines had canceled 384 flights scheduled for Monday, most of which involved airports in the Kanto area. At that time, authorities had not reported any infrastructure damage that would halt operations. The typhoon also impacted a major event in Chiba. The organizers of the Tokyo Game Show canceled the final day due to the typhoon and transportation issues. Travelers faced schedule changes as transportation providers adapted to worsening weather conditions.
Rail and maritime services also experienced notable disruptions. Eight operators suspended services on 16 conventional railway lines by 1:45 p.m., with another planning suspensions affecting 12 more lines. No suspensions involving Shinkansen services were reported at that time. Maritime routes were halted on 36 lines, mainly in Kanto and Kyushu, while highway bus companies suspended 62 routes, primarily in Chiba and Nagano. Local buses stopped 26 routes, although some services continued with partial suspensions.
Flood Prevention Measures Intensify as Typhoon Moves Northeast
In response to the increasing rainfall, flood-control measures were heightened across river basins near Dujuan’s path. Thirteen dams reached thresholds for pre-release actions, while three began early water releases. Nine dams conducted flood-control operations, with two still active at noon. No reports of river flooding had been received by midday. Emergency crews deployed pumps and lighting vehicles to Chiba to assist with drainage and overnight response efforts. Local authorities maintained ongoing surveillance of rivers, slopes, and low-lying areas.
Forecasts from weather officials predict further heavy rain across Tokai, Kanto-Koshin, the Izu Islands, and Tohoku through Monday. Total rainfall through noon Tuesday could reach 250 millimeters in Kanto, Tokai, and the Izu Islands, while Tohoku might see up to 150 millimeters during the same period. Residents were advised to stay vigilant for landslides, flooding, rising rivers, strong winds, and high waves. As Typhoon Dujuan moves northeastward over waters near eastern Japan, local warnings and evacuation notices continue to be updated accordingly.