Japan

Situation Summary

Japan faced acute weather-driven disruption across the Kanto and Okinawa regions during September 21–27, 2026, as two major typhoons brought flooding, landslides, power outages, and mass evacuations. Typhoon Dujuan caused at least nine deaths and four missing persons in the Tokyo–Kanagawa–Chiba corridor by September 23, with approximately 1.6–2 million residents under evacuation advisory. A second system, Typhoon Surigae, intensified during the week and posed imminent risk to Okinawa as of September 28, extending the disruption window. Concurrent incidents—including an airport emergency landing, a multi-vehicle expressway collision, and a serious violent crime in Gifu—underscore the stress on infrastructure and emergency response capacity during the crisis period.

Key Developments

• Kanto region (Tokyo, Kanagawa, Chiba) — September 21–23: Typhoon Dujuan produced record rainfall, triggering widespread flooding and landslides; at least nine deaths and four missing persons reported by September 23, with 1.6–2 million residents under evacuation advisory.

• Tokyo and surrounding prefectures — September 22: Power outages affected approximately 45,000–59,000 households; 22 people sustained injuries during the storm.

• Miura, Kanagawa Prefecture — September 22: Landslides along the Pacific coast killed or left missing multiple persons; authorities sustained flood and landslide evacuation warnings.

• Tokyo Imperial Palace, Otemachi — September 22: Moat overflow from Typhoon Dujuan flooded roads at the Otemon Gate, briefly affecting central-Tokyo access.

• Okinawa — September 23–28: Typhoon Surigae intensified and approached Okinawa with forecast violent winds, heavy rain, and high-wave risk; renewal of major disruption anticipated by September 28.

• Naha Airport, Okinawa — September 23: ANA flight bound for Saga made emergency landing following right-engine trouble shortly after takeoff; passengers evacuated with some minor injuries reported.

• Daini Shinmei Road, Kobe, Hyogo Prefecture — September 24: Multi-vehicle collision (10 trucks and passenger vehicles) caused one serious injury and nine minor injuries; expressway section closed.

• Osaka City — September 24: Two men allegedly robbed a male victim (age 30s) of a bag containing approximately ¥1 million and his shoes after assault; victim sustained minor injuries.

• Kakamigahara, Gifu Prefecture — September 26: Police arrested a 25-year-old man on suspicion of attempted murder following allegations he threw two young daughters from a sixth-floor apartment balcony; children's condition not detailed in available reporting.

Highest-Risk Areas

Sub-national risk breakdown is not available in current GeoBit data. However, the Kanto region (Tokyo, Kanagawa, Chiba) and Okinawa Prefecture demonstrated acute vulnerability during the week: Kanto absorbed the highest casualty toll (nine dead, four missing) and largest displacement (1.6–2 million evacuees) from Typhoon Dujuan, while Okinawa faced imminent secondary impact from Typhoon Surigae. Infrastructure fragility—power outages, transport disruption, and emergency-response strain—cascaded across both zones.

How GeoBit Would Assist

Corporate security teams in Japan should employ AOI Monitoring & Early Warning on Kanto and Okinawa prefectures to track typhoon progression and casualty/displacement data in real time. Environmental & Health intelligence and GIS & Spatial Analysis capabilities enable mapping of flood zones, landslide corridors, and power-outage footprints to guide duty-of-care decisions for personnel and asset location. Early Warning & Prediction feeds supply 5–7 day typhoon forecasts and secondary-hazard risk, enabling proactive evacuation and supply-chain rerouting before disruption onset.

7-Day Outlook

Typhoon Surigae will likely make landfall in Okinawa by late September 28, producing violent weather through approximately September 29–30 and extending power, transport, and communication disruption southwestward. Recovery from Typhoon Dujuan in the Kanto region will remain incomplete, with ongoing landslide risk and restoration of critical infrastructure (power, rail, expressways). Corporate personnel and supply chains in both regions should anticipate 7–10 days of elevated disruption and limited mobility.

Previous Weekly Briefs

A new Japan brief is written every Monday, covering the week — each with its own risk map and downloadable CSV. Use the calendar to go further back.

• September 21, 2026⬇ CSV · $5
• September 14, 2026⬇ CSV · $5
• September 7, 2026⬇ CSV · $5
• September 3, 2026⬇ CSV · $5
• September 2, 2026⬇ CSV · $5
• September 1, 2026⬇ CSV · $5
• August 31, 2026⬇ CSV · $5