TOKYO, JAPAN / RankWire.AI / – On Monday, eastern Japan faced severe weather conditions as Typhoon Dujuan brought heavy rainfall and powerful winds, prompting emergency landslide alerts and widespread disruptions to transportation. The Japan Meteorological Agency issued its highest landslide warning for Oshima in the Izu Islands shortly after midday. Some areas on the island chain recorded rainfall exceeding 500 millimeters. Additionally, Chiba Prefecture experienced more than 300 millimeters of rain from Saturday until early Monday afternoon. Authorities cautioned residents about potential flooding, swollen rivers, landslides, and hazardous coastal conditions.
At midday, Dujuan was traveling north-northeast over the waters west of Hachijojima, maintaining a broad storm-force wind zone. Meteorologists tracked its course toward the Izu Islands and the Kanto region, predicting the typhoon would pass near Kanto later in the day as it accelerated northeastward. Officials issued warnings for violent winds, turbulent seas, and additional heavy rainfall along the eastern Pacific coast. They also kept a close eye on the development of linear rain bands, which have the potential to generate intense, localized downpours within a short timeframe.
The storm has already caused damage and led to closures across multiple prefectures. The Ministry of Land, Infrastructure, Transport and Tourism reported three landslides in Chiba by 2 p.m. One residence was completely destroyed, and another sustained partial damage. Miyazaki also experienced two landslides, with reports of one fatality and one injury. Heavy rains resulted in the shutdown of 32 sections of six expressways and three national roads. Flooding and fallen trees forced the closure of 16 prefectural road segments across Ibaraki, Saitama, and Chiba.
Heavy rainfall causes flight cancellations and impacts public transit
By 11 a.m., the ministry’s update indicated that airlines had canceled 384 flights scheduled for Monday. Most cancellations affected airports serving the Kanto area. At that time, no infrastructure damage had been reported that would hinder flight operations. The typhoon also impacted a major event in Chiba—the Tokyo Game Show’s final day was called off due to the storm and transportation issues. Travelers faced schedule changes as transport providers adjusted services to cope with worsening weather conditions.
Railway and maritime services suffered significant disruptions. Eight railway operators suspended service on 16 conventional lines by 1:45 p.m., with another planning suspensions on 12 more lines. No Shinkansen suspensions had been reported at that time. Maritime routes totaling 36, mainly in Kanto and Kyushu, were halted. Highway bus services suspended 62 routes, largely in Chiba and Nagano, while local bus routes were paused on 26 lines; some services continued partially.
Flood mitigation efforts intensify as Typhoon Dujuan advances northeast
Flood control measures were stepped up as rainfall accumulated across river basins near Dujuan’s path. Thirteen dams reached thresholds requiring pre-release actions, and three began early water releases. Flood prevention operations were underway at nine dams, with two still active at noon. No reports of river flooding had been received by midday. Emergency teams deployed pumping and lighting vehicles to Chiba to support drainage and overnight response efforts. Local authorities continued monitoring rivers, slopes, and low-lying areas.
Meteorological forecasts predict additional heavy rain across Tokai, Kanto-Koshin, the Izu Islands, and Tohoku through Monday. Rainfall totals are expected to reach 250 millimeters across Kanto, Tokai, and the Izu Islands by noon Tuesday, while Tohoku could receive up to 150 millimeters during the same period. Officials advised residents to stay alert for landslides, flooding, rising rivers, strong winds, and high waves. Warnings and evacuation notices are being updated continuously as Typhoon Dujuan moves northeastward over waters near eastern Japan.