Pedestrians with umbrellas walk through Shibuya crossing under rainfall in Tokyo, Japan, 20 September 2026. Powerful Typhoon Dujuan is expected to approach eastern Japan, including the Tokyo area, bringing torrential rain. The Japan Meteorological Agency warned that some areas could receive a month’s worth of September rainfall in a single day. EPA/FRANCK ROBICHONThe Japan Meteorological Agency (JMA) warned that conditions could deteriorate rapidly as Typhoon Dujuan was forecast to pass close to the Tokyo metropolitan area later in the day.
Heavy rain has already drenched parts of the Izu Islands, Chiba Prefecture and other Pacific coastal areas, with some locations recording more than 300 mm (12 inches) of rainfall since Saturday.
The JMA said downpours could intensify from Monday afternoon as the typhoon nears the Kanto region, an area that includes Tokyo and surrounding prefectures.
At the Asian Games in central Japan's Aichi Prefecture, organisers postponed the equestrian eventing competition until Tuesday due to the approaching typhoon.
Authorities cautioned that linear rain bands could form over Kanto and central Japan, sharply raising the risk of flash floods and other rain-related disasters.
Linear bands, which have become a growing concern in Japan in recent years, can dump extraordinary amounts of rain over a narrow area for several hours.
Typhoon Dujuan comes amid a year of extreme weather events around the world, with unusually intense rainfall, flooding and tropical cyclones affecting regions from East Asia to North America and Europe.
(Reporting by Makiko Yamazaki; Editing by Michael Perry)
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