TOKYO, JAPAN / RankWire.AI / – Eastern Japan faced heavy rain and strong winds on Monday as Typhoon Dujuan struck, leading to emergency landslide warnings and widespread travel disturbances. The Japan Meteorological Agency issued its highest landslide alert for Oshima in the Izu Islands shortly after midday, with rainfall surpassing 500 millimeters in parts of the island chain. Chiba Prefecture also recorded more than 300 millimeters from Saturday through early Monday afternoon, prompting officials to warn residents of potential flooding, swollen rivers, landslides, and hazardous coastal conditions.
At noon, Dujuan was advancing north-northeast over waters west of Hachijojima while maintaining a broad storm-force wind zone, with forecasters tracking its movement toward the Izu Islands and the Kanto region. The typhoon was anticipated to pass near Kanto later Monday as it accelerated northeastward, with weather authorities warning of violent winds, rough seas, and additional heavy rainfall along eastern Pacific coastal areas. They also monitored conditions for linear rain bands capable of producing intense downpours over short durations.
Damage and closures occurred across multiple prefectures due to the storm. The Ministry of Land, Infrastructure, Transport and Tourism reported three landslides in Chiba by 2 p.m., destroying one residence and causing partial damage to another. Miyazaki also experienced two landslides, resulting in one death and one injury. Heavy rain led to the closure of 32 sections on six expressways and three national roads, while flooding and fallen trees shut 16 prefectural road segments across Ibaraki, Saitama, and Chiba.
Heavy Rains Cause Flight and Transit Cancellations
By 11 a.m., airlines canceled 384 flights scheduled for Monday, primarily affecting airports serving the Kanto region, though airport infrastructure had not reported damage at that time. A major public event in Chiba was also canceled as organizers called off the final day of the Tokyo Game Show due to the typhoon and transportation concerns. Travelers faced schedule changes as service adjustments were made in response to worsening weather conditions.
Rail and maritime networks experienced notable disruptions, with eight operators suspending service on 16 conventional railway lines by 1:45 p.m. An additional operator planned suspensions affecting 12 more lines, though no Shinkansen services had been halted at that point. Maritime routes were halted on 36 lines, mostly in Kanto and Kyushu, while highway bus companies suspended 62 routes, mainly in Chiba and Nagano. Local buses also stopped 26 routes, although some services continued with partial suspensions.
Flood Control Measures Increase as Dujuan Advances Northeast
As rainfall accumulated across river basins along Dujuan’s path, flood control efforts expanded, with thirteen dams reaching thresholds for pre-release actions and three initiating advance water releases. Nine dams carried out flood-control operations, although only two were still active at noon, with no reports of river flooding by midday. Emergency teams deployed pumping and lighting vehicles to Chiba to support drainage and overnight response efforts, while local governments kept monitoring rivers, slopes, and low-lying districts.
Weather forecasts predict additional heavy rain through Monday across Tokai, Kanto-Koshin, the Izu Islands, and Tohoku, with rainfall totals reaching 250 millimeters in Kanto, Tokai, and the Izu Islands, and up to 150 millimeters in Tohoku during the same period. Authorities urged residents to stay alert for landslides, flooding, rising rivers, strong winds, and high waves. As Typhoon Dujuan moves northeastward over waters near eastern Japan, local warnings and evacuation directives continue to evolve.