Three active typhoons have developed simultaneously in the Pacific Ocean around Japan as of October 5, 2026. This rare triple-typhoon phenomenon threatens to disrupt travel and bring harsh weather conditions during an upcoming three-day holiday period. Meteorological agencies confirmed that Typhoon No. 27 (Choi-wan), Typhoon No. 28 (Nolo), and the newly formed Typhoon No. 29 (Koguma) are moving through the western Pacific region.
Local authorities expect the combined impacts of strong winds, high waves, and localized rain to affect portions of Japan between October 10 and October 12. The Japan Meteorological Agency (JMA) reported that Typhoon Choi-wan was designated as a large, very strong storm near the Ogasawara Islands. Its central atmospheric pressure reached 935 hectopascals, with maximum sustained winds of 45 meters per second. The system is forecast to move north-northeast along Japan’s eastern offshore waters.
Details on the Three Active Western Pacific Storms
Satellite images captured by the Himawari weather satellite on October 5 revealed three distinct tropical systems tracking across the region. Each storm is currently at a different stage of intensity and structural organization:
- Typhoon No. 27 (Choi-wan): Featuring a clearly defined eye and a broad cloud system, this storm packed maximum gusts of 65 meters per second while moving at about 20 kilometers per hour. It was projected to turn eastward into waters east of Japan before transitioning into an extratropical cyclone.
- Typhoon No. 28 (Nolo): Formed after Hurricane Nolo crossed the International Date Line from the eastern Pacific, making it the first crossover typhoon in three years. Located near Midway Atoll, it registered a central pressure of 955 hectopascals with sustained winds reaching 50 meters per second.
- Typhoon No. 29 (Koguma): Initially less organized near the Marshall Islands, this system began moving northwest at roughly 15 kilometers per hour. Forecasts indicate it could strengthen into a robust typhoon near Minamitorishima.
Impacts on Japan’s Weather and Recovery Efforts
According to the Japan Weather Association (JWA), the simultaneous presence of three systems marks the first time in five years that such a cluster has occurred during the month of October. The broader atmospheric pattern brought sudden shifts in weather across Tokyo and surrounding prefectures, ending a prolonged spell of rain only to introduce chilly, mist-like showers and gusty winds.
In regions such as Chiba Prefecture, which is still recovering from record rainfall and landslides caused by earlier tropical storms, lingering floodwaters and drainage challenges have heightened local anxieties. Meanwhile, public safety officials and transport operators across the Kanto, Tohoku, and Shikoku regions remain on high alert as forecasting models continue to track the unpredictable paths of the three sweeping storms.
Frequently Asked Questions
What caused the triple-typhoon formation near Japan?
The rare occurrence is the result of three independent tropical systems-Typhoon Choi-wan, Typhoon Nolo, and Typhoon Koguma-developing simultaneously across the western Pacific Ocean during early October 2026.
When are these typhoons expected to impact Japan?
The combined weather impacts, including strong winds, high waves, and rough seas along Pacific coasts, are expected to affect parts of Japan through the middle of October, overlapping with local holiday periods.
What makes Typhoon No. 28 unusual?
Typhoon No. 28 (Nolo) originated as a hurricane in the eastern Pacific before crossing the International Date Line, marking the first crossover typhoon observed in the region in three years.
How rare is an October triple-typhoon event?
According to the Japan Weather Association, having three active tropical systems simultaneously in the western Pacific during the month of October is an uncommon event, happening for the first time in five years.
