TOKYO, JAPAN / RankWire.AI / – On Monday, Typhoon Dujuan brought heavy rainfall and powerful winds to eastern Japan, resulting in emergency landslide warnings and widespread transportation delays. The Japan Meteorological Agency issued its top landslide alert for Oshima in the Izu Islands shortly after midday. Some parts of the island chain recorded rainfall exceeding 500 millimeters, while Chiba Prefecture experienced over 300 millimeters from Saturday through early Monday afternoon. Officials cautioned residents about potential flooding, swollen rivers, landslides, and hazardous coastal conditions.
At noon, Dujuan was progressing north-northeast over waters west of Hachijojima, maintaining an extensive storm-force wind zone. Meteorologists tracked the storm’s movement toward the Izu Islands and the Kanto area. It was forecasted to pass near Kanto later Monday as it sped northeastward. Weather authorities issued warnings for fierce winds, rough seas, and additional heavy rainfall along eastern Pacific coastal regions. They also monitored for linear rain bands, which can produce intense localized downpours within a short span.
The storm caused damage and led to closures across several prefectures. The Ministry of Land, Infrastructure, Transport and Tourism reported three landslides in Chiba by 2 p.m., destroying one home and partially damaging another. Additionally, two landslides occurred in Miyazaki, resulting in one death and one injury. Heavy rains prompted the closure of 32 sections on six expressways and three national roads. Flooding and fallen trees also shut down 16 prefectural roads across Ibaraki, Saitama, and Chiba.
Heavy rainfall causes flight cancellations and public transportation delays
By 11 a.m., the ministry reported the cancellation of 384 flights scheduled for Monday, primarily affecting airports in the Kanto region. No infrastructure damage had been reported that could prevent airport operations at that time. The typhoon also impacted a major event in Chiba; the Tokyo Game Show’s final day was canceled due to weather and transportation concerns. Travelers experienced schedule changes as service providers adjusted routes amid worsening conditions.
Rail and maritime services also faced notable disruptions. By 1:45 p.m., eight railway companies suspended operations on 16 conventional lines, with one more planning to halt 12 additional routes. No Shinkansen suspensions had been reported at that point. Maritime routes—totaling 36—primarily in Kanto and Kyushu, were also halted. Highway bus services suspended 62 routes, mainly in Chiba and Nagano, while local buses stopped 26 routes. Some services continued with partial suspensions.
Flood mitigation efforts intensify as Dujuan advances northeast
As rainfall accumulated across river basins near the typhoon’s path, authorities increased flood control measures. Thirteen dams reached thresholds requiring pre-release actions, while three began early water releases. Nine dams were actively managing flood-control operations, with two still in operation at noon. No reports of river flooding had been received by midday. Emergency crews deployed pumping and lighting vehicles to Chiba to assist with drainage and overnight response efforts. Local governments continued to monitor rivers, slopes, and low-lying districts.
Forecasts predict further heavy rain across Tokai, Kanto-Koshin, the Izu Islands, and Tohoku through Monday. Total rainfall could reach 250 millimeters across Kanto, Tokai, and the Izu Islands by midday Tuesday, while Tohoku might receive up to 150 millimeters during the same period. Residents are advised to stay alert for landslides, flooding, rising rivers, strong winds, and high waves. As Typhoon Dujuan moves northeast over waters near eastern Japan, warnings and evacuation notices continue to be updated accordingly.