Typhoon Dujuan, Causes, Effects, Formation, Latest News

Typhoon Dujuan has brought strong winds, torrential rainfall, flooding and landslides to parts of Japan, particularly areas around Tokyo and the Kanto region. The storm has disrupted flights, railway services and daily life, while authorities have issued evacuation advisories in several areas.

What is Typhoon Dujuan?

Typhoon Dujuan is a tropical cyclone that moved towards the Pacific coast of Japan in September 2026. It developed in the western Pacific and strengthened before approaching eastern Japan.

The storm had sustained winds of around 130 km/h, with stronger gusts reported as it approached Japan. The Japan Meteorological Agency (JMA) warned of extremely heavy rainfall, flooding and landslides.

Typhoon Dujuan Causes

Typhoon Dujuan developed due to favourable tropical cyclone-forming conditions over the western Pacific, including warm ocean waters, abundant moisture, low atmospheric pressure and favourable wind conditions. These factors helped the system organise and intensify as it moved towards Japan.

• Warm ocean waters: High sea-surface temperatures provided heat and moisture to the developing storm.
• Rising moist air: Warm, humid air rose from the ocean surface, creating and strengthening a low-pressure system.
• Latent heat release: Condensation of water vapour released latent heat, providing additional energy to the cyclone.
• Coriolis effect: Earth’s rotation caused the moving air to rotate around the low-pressure centre.
• Low vertical wind shear: Relatively favourable wind conditions helped the storm maintain its organised structure and strengthen.

Also Read:- Asian Games 2026 Medal Tally

‹ ›

Impact of Typhoon Dujuan on Japan

Typhoon Dujuan caused significant disruption across eastern Japan.

• Heavy rainfall: Several areas received very high rainfall, with some locations in the Izu Islands recording more than 300 mm of rain.
• Flooding and landslides: Intense rainfall increased the risk of flash floods and landslides, particularly in mountainous and coastal areas.
• Evacuation advisories: More than 1.6 million people in and around Tokyo were advised to evacuate at the height of the storm.
• Deaths and missing people: Landslides caused by torrential rainfall resulted in deaths and left several people missing, according to Japanese authorities and NHK.
• Power outages: Tens of thousands of households lost electricity.
• Transport disruption: Hundreds of flights were cancelled and some railway services were suspended.

Also Read:- India’s Monsoon Deficit 2026

How Do Typhoons Form?

Typhoons are regional names for tropical cyclones in the Northwest Pacific. They form when warm ocean water above 27°C heats moist air, causing it to rise and create a low-pressure area. The Coriolis effect makes the winds rotate, while the release of latent heat provides energy for the storm to strengthen.

Essential Conditions for Formation

• Warm Sea Surface: Ocean temperatures above 27°C provide heat and moisture needed for development.
• Coriolis Force: Earth’s rotation gives the system its spin; therefore, typhoons generally do not form within 5° of the equator.
• Low Vertical Wind Shear: Weak changes in wind speed and direction with height allow the storm to remain organised.
• Pre-existing Low Pressure: A disturbance or cluster of thunderstorms provides the initial circulation.
• Upper-Level Divergence: Outflow of air at higher levels helps maintain low pressure and strengthens the cyclone.

Also Read:- Asian Games 2026 Indian Cricket Team

Stages of Development

• Formation Stage: Warm, moist air rises, condenses and releases latent heat, leading to thunderstorms and falling surface pressure.
• Mature Stage: Winds strengthen around a central eye, surrounded by the eyewall, which has the strongest winds and heaviest rainfall.
• Decay Stage: The typhoon weakens after moving over land or colder waters, as its supply of heat and moisture is reduced.