# Extreme weather and flooding in Japan > Live situation record from CLSTR: https://clstr.news/situations/extreme-weather-and-flooding-in-japan > Updated: 2026-09-07T01:18:24.000Z. Sources: 9. Developments: 2. Japan has faced significant disruptions due to extreme weather, including lightning strikes and heavy rainfall. In late August, a lightning strike in Kyoto caused equipment malfunctions and the temporary closure of the ‘Sustena Kyoto’ environmental learning facility. Simultaneously, heavy rain in Chiba City flooded underground electrical equipment, resulting in power outages that lasted over a month for some residents and water supply disruptions exceeding one week. By early September, intense rainfall continued to impact various regions. In Chiba, rainfall exceeding 300mm caused localized flooding and submerged vehicles. In Toyama Prefecture, heavy rains flooded roads, homes, and agricultural fields, while also causing soil erosion. In Hokkaido, authorities in Otaru issued advisories regarding strong winds and potential rain. On September 7, widespread weather warnings were triggered by heavy rain and the potential for ‘linear precipitation zones’. In Osaka Prefecture, authorities issued strict warnings for landslides and flooding, with some areas facing up to 200mm of rain within 24 hours. A low-pressure system, evolving from Typhoon 24, is moving along the autumn rain front, posing risks of sudden flooding and river overflows in the Shikoku, Kinki, and Tokai regions, as well as intense rainfall in the Kanto region. Additionally, the 8th Regional Coast Guard Headquarters issued maritime safety advisories for the Hokuriku region due to unstable atmospheric conditions. As conditions persisted on September 7, Kagawa Prefecture issued Level 4 landslide disaster danger warnings for several municipalities, including Marugame, Zentsuji, Kotohira, and Manno. In the Kanto region, rain was expected to expand, with residents in the Izu Islands and Boso Peninsula advised to remain vigilant against landslides following recent record-breaking rainfall. In Yamagata, weather patterns indicated continued rain through the night, while some areas faced extremely heavy rain of up to 60 mm per hour. ## Claims - Osaka Prefecture faces the possibility of linear precipitation zones from dawn to early afternoon on September 9. (single source) - There is a risk of extremely heavy rain of 60 mm per hour in Osaka Prefecture. (single source) - Level 4 landslide disaster danger warnings were issued for Marugame, Zentsuji, Kotohira, and Manno in Kagawa Prefecture. (single source) - Heavy rain in the Hokuriku region may cause vessel accidents such as flooding or sinking of moored small vessels. (single source) - Rain coverage in Kanto is expected to expand in the afternoon, with heavy rain likely during evening commute hours. (single source) ## Timeline ### 2026-09-07: Japan weather alerts: Heavy rain and landslide warnings issued across multiple regions Heavy rain and landslide warnings have been issued across multiple Japanese regions, including Osaka, Kagawa, and Kanto, as tropical depressions and autumn rain fronts bring risks of flooding and landslides. 7 sources. https://clstr.news/cluster/japan-experiences-heavy-rainfall-and-flooding-across-multiple-regions ### 2026-08-21: Japan weather incidents cause facility closures and power outages Lightning strikes have forced the temporary closure of an environmental facility in Kyoto, while heavy rains in Chiba have caused prolonged power and water outages due to flooded underground equipment. 3 sources. https://clstr.news/cluster/japan-weather-incidents-cause-facility-closures-and-power-outages --- Cite as: Extreme weather and flooding in Japan. CLSTR, https://clstr.news/situations/extreme-weather-and-flooding-in-japan