Full Breakdown
Typhoon Dujuan Triggers Deadly Landslides and Power Outages in Eastern Japan
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Storm Impact on September 21-22, 2026
On September 21, 2026, Typhoon Dujuan moved toward Japan’s Pacific coast, bringing torrential rain to the Kanto region. By the following day the storm had shifted northeast away from the mainland, but the heavy precipitation it left behind triggered landslides, flooding, widespread power loss, and major transport disruptions across Chiba, Kanagawa, Ibaraki and the Izu Islands.
Background & Context
The Japan Meteorological Agency (JMA) linked the intensity of Dujuan to the ongoing El Niño episode, which has been associated with stronger tropical cyclones and record-breaking rainfall in the region.
Data & Statistics
- Fatalities & Missing: FDMA confirmed five deaths with six missing; NHK cited four dead.
- Evacuations: Over 74,000 people were placed under evacuation instructions.
- Rainfall Records: Oshima Island recorded 832 mm in 48 hours, the highest on record; Tokyo’s Edogawa Ward logged 282.5 mm in 24 hours.
- Power Outages: About 45,000 households lost electricity, mainly in Chiba Prefecture.
- Transport Disruption: Japan Airlines canceled 120 domestic and 15 international flights; All Nippon Airways canceled 140 domestic flights. Haneda Airport saw nearly 400 cancellations, Narita more than 100. Several railway lines, including sections of the Sobu, Narita and Sotobo lines, were suspended.
- Property Damage: Over 470 buildings were damaged in Kanagawa, Chiba and Ibaraki, and more than 460 houses on the Izu Islands.
Official Statements & Responses
- The JMA issued Level 5 landslide warnings for the northern Izu Islands and Level 4 alerts for much of Kanto.
- The FDMA directed evacuation orders for tens of thousands of residents and activated the Disaster Relief Act for 25 municipalities.
- TEPCO confirmed most outages were in Chiba and began restoration work.
- Local police, firefighters and Self-Defense Forces conducted search and rescue operations, focusing on landslide sites in Yokosuka, Miura and Sodegaura.
On-the-Ground Reports
Residents described “deep water” inundating streets and homes. Richard Yonamine, a homeowner in Sakura, Chiba, said floodwater entered his house for the first time in more than three decades.
Conflicting Reports & Gaps
- Death Toll: Sources differ—NHK (four), FDMA (five).
- Missing Persons: All reports agree on six missing, but locations vary.
- Power Outage Figures: Reported households without electricity range from about 45,000 to 42,260.
Verbatim Quotes
- “I'm scared if it starts raining ... I worry that as soon as it starts pouring, it'll turn into a major problem,” — Richard Yonamine
What’s Next
The JMA forecast sunny skies for Kanto on Tuesday, indicating the immediate threat of additional landslides is diminishing as Dujuan moves farther offshore. Authorities continue to monitor river levels and maintain evacuation advisories where flooding risks persist.