Typhoon Dujuan, the 25th typhoon of the 2026 typhoon season in Japan, developed over the Western Pacific in September 2026, evolving from a tropical depression into a tropical storm before strengthening into a typhoon, with sustained winds exceeding 120 km/h and powerful gusts (RainViewer; WeatherUSA).
Rather than making direct landfall, the system tracked along Japan’s eastern coast, bringing heavy rainfall to Chiba and Kanagawa prefectures (BBC, 2026; The Japan Times, 2026). Typhoon Dujuan particularly affected the Boso Peninsula in Chiba Prefecture, Japan, on 21 September 2026, just east of Tokyo. It tracked north along Japan’s Pacific coast, bringing torrential rainfall, flooding and landslides to the Kantō region (ClimaMeter, 2026).
→ The Japan Meteorological Agency issued its highest-level landslide alerts for parts of the Izu Islands and surrounding prefectures, warning of the dangers posed by torrential rainfall (Independent, 2026)…
Source: World Weather Attribution
World Weather Attribution
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