Typhoon Dujuan bore down on eastern Japan on Monday with the Japan Meteorological Agency issuing Level 4 danger warnings — the second-highest tier, meaning residents should prepare to evacuate — for parts of the Izu Islands and the Kanto region as the storm’s center tracked north-northeast at roughly twenty kilometers per hour. Organizers canceled the final day of the Tokyo Game Show, and East Japan Railway Company announced partial or full-day suspensions on multiple lines in Chiba, Ibaraki, and western Tokyo, turning Silver Week’s last holiday into a stay-home day for millions of commuters.
Forecast numbers
As of early Monday, JMA said Dujuan packed central pressure near 965 hectopascals with sustained winds around thirty-five meters per second and gusts up to fifty meters per second. The agency warned that rainfall in the twenty-four hours through Tuesday morning could reach three hundred millimeters in Kanto and the Izu chain, with two hundred millimeters possible in Tohoku’s Pacific slopes — totals that can trigger landslides on saturated Silver Week hiking trails.
The Japan Times reported the storm was the twenty-fifth named system of the season and was moving over warm Pacific waters south of the Izu Islands before curving toward the Tokyo metropolitan area. CNA noted heavy rain had already exceeded three hundred millimeters in parts of Chiba since Saturday, with linear rain bands — narrow downpours that dump extraordinary totals in hours — possible as the typhoon neared shore.
Transport and events
JR East’s service bulletin listed suspensions on Uchibo and Sotobo lines in Chiba and on Joban local segments in Ibaraki, with limited operations on other corridors expected to resume only after track inspections. Highway operators urged motorists to postpone nonessential trips as wind thresholds for bridge restrictions approached.
The Tokyo Game Show, which opened Thursday at Makuhari Messe, said it would not open Monday’s public sessions, shortening the industry showcase by a day. Publishers had stacked hands-on demos for domestic mobile and console titles; ticket holders were told refunds would process automatically. In Aichi Prefecture, Asian Games organizers postponed equestrian eventing until Tuesday because of the same storm system’s outer bands.
What officials asked residents to do
JMA urged people in Pacific-facing municipalities to secure outdoor furniture, clear storm drains, and identify evacuation buildings before nightfall, when wind damage to power lines becomes harder to repair. Tokyo’s metropolitan government opened multilingual updates on river levels for the Tama and Arakawa basins, though no widespread dam releases were ordered as of midday.
Utility crews pre-staged generators at hospitals along the Boso Peninsula, where 2024 typhoons left clinics on backup power for days. Convenience-store chains reported bottled-water restocking in Yokohama and Chiba city neighborhoods that flooded during earlier September squalls.
Regional context
Taiwan’s Central Weather Administration had already forecast that Dujuan would miss a direct hit on the island, steering instead toward Japan — a track that spared Kaohsiung and Taipei from landfall winds but still fed moisture into East Asia’s holiday travel corridors. For Japan readers, the immediate risk is domestic: saturated soils on Izu Oshima and the Miura Peninsula, combined with commuter returns from Silver Week trips, raise the chance of delayed trains even after skies clear.
Until JMA downgrades warnings, the confirmed facts are Level 4 advisories in Kanto and Izu, a canceled Game Show finale, and JR suspensions across Chiba and Ibaraki. The storm’s name and coordinates will update overnight; the operational message for Monday is to treat landslide and wind alerts as live, not ceremonial, during one of the year’s busiest domestic travel weeks.
