Japan Typhoon Jangmi Brings Torrential Rain, Flight Disruptions, Landslides and Coastal Flooding Across Okinawa Kyushu Shikoku Kansai and Kanto Regions as Government Issues Urgent Safety Advisory

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May 31, 2026 16:49 GMT+5:30

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The Japan Meteorological Agency (JMA) has issued urgent warnings as Typhoon Jangmi moves toward Japan’s southern and eastern regions, bringing risks of extreme rainfall, violent winds, storm surges, landslides, and river flooding. Travellers and residents are urged to monitor official forecasts and adjust travel plans accordingly. The typhoon is expected to impact large areas along Japan’s Pacific coast between Kyushu and Kanto, including Tokyo, through June 3, 2026. These warnings are intended to prevent life-threatening incidents and safeguard public safety. 

Government Forecast: Heavy Rain Expected Across Key Regions

The JMA warns that heavy rain may fall even before the typhoon directly impacts Japan due to a stationary front north of the system. Rainfall totals in affected regions could reach 200–300 millimetres, prolonging flooding and increasing the risk of landslides. Southern islands, including Okinawa and Amami, will experience the earliest effects, with rainfall reaching 100mm by noon on June 1 and 300mm by noon on June 2. Western Japan regions such as Shikoku and Kansai are expected to receive up to 300mm by noon on June 3, while central Japan areas including Tokai and Kanto could see 200mm. 

Typhoon Trajectory: Southern Islands First, Mainland Japan Next

Typhoon Jangmi is projected to approach Okinawa and the Amami Islands on June 1–2 before shifting northeast toward western and eastern Japan by June 3, weakening slightly. Authorities advise residents and travellers to be cautious of strong gusts, flooding, and landslides. Tourists in southern island destinations, popular for their resorts and beaches, should prepare for extended rainfall and disruptions to transportation. 

Airlines Respond With Flight Cancellations

Major Japanese airlines, including Japan Airlines (JAL) and All Nippon Airways (ANA), have cancelled flights to and from Okinawa due to safety concerns. Passengers travelling during this period are urged to check airline communications and rebook flights if necessary. Authorities also note that delays and cancellations may extend to regional airports in Kyushu, Shikoku, Kansai, and Kanto, affecting both domestic and international travellers. Travel insurance and contingency plans are highly recommended. 

Storm Surges and Landslide Risks

The Japanese government emphasizes the dual hazards of storm surges and landslides, which can occur simultaneously with heavy rainfall. Coastal areas are at risk of flooding, while hilly and mountainous regions may experience soil destabilisation leading to landslides. Visitors engaging in outdoor tourism, including hiking or coastal sightseeing, should avoid vulnerable areas and heed local evacuation orders. Emergency services are coordinating with prefectural authorities to monitor and respond to high-risk zones. 

Travel Advisory Checklist for Tourists

The Japanese government advises all travellers to follow these essential safety measures:

1. Monitor official JMA bulletins frequently for updates. (jma.go.jp)
2. Follow local evacuation orders and seek safe shelter promptly.
3. Avoid travel in flooded areas or on rivers prone to overflow.
4. Confirm transportation schedules with airlines, trains, and ferry operators.
5. Prepare emergency supplies, including water, food, medications, and communication devices.
6. Stay indoors during high winds and heavy rainfall for safety.

Regional Impact on Tourism

• Okinawa & Amami Islands: Heavy rain and high winds may disrupt resort activities and ferry services, with emergency alerts in place.
• Kyushu & Shikoku: Mountainous terrain increases landslide risk; travellers should avoid hiking trails and rivers.
• Kansai (Osaka, Kyoto, Kobe): Rainfall could impact public transport, including bullet trains, buses, and airports.
• Tokai & Kanto (Nagoya, Tokyo): Flooding risk in urban areas; airport operations may experience delays or cancellations.

Travellers planning leisure or business trips in these regions must reassess itineraries and allow flexibility for safety. 

Government Response and Preparedness

Authorities continue to coordinate disaster response, issuing emergency bulletins to prefectural governments, transport operators, and public safety offices. Citizens and tourists are encouraged to register with local alert systems and maintain contact with accommodation providers for instructions. Evacuation shelters are prepared in high-risk areas, and government websites provide live updates and forecasts to assist in travel planning. 

Summary

Typhoon Jangmi represents a significant threat to both residents and travellers in Japan, with official forecasts predicting heavy rainfall exceeding 300mm, strong winds, storm surges, landslides, and transportation disruptions. The Japanese government, through the JMA and local authorities, is actively monitoring the situation and issuing travel and safety advisories. Tourists should prioritise safety, stay informed via official channels, and adjust travel plans accordingly.