Miyazaki, Jun 02, 2026 –
[updated 14:45 p.m.] Typhoon No. 6 is expected to bring prolonged and potentially dangerous rainfall to a wide swath of Japan, with meteorologists warning that some areas could receive more than 300 millimeters of rain and face the risk of linear rainband formation even before the storm makes its closest approach.
The Japan Meteorological Agency has issued a half-day forecast for possible linear rainbands, highlighting the growing threat of concentrated heavy rainfall from western Japan to eastern Japan.
Authorities are urging residents to remain on high alert for landslides, flooding in low-lying areas, and rapidly rising rivers.
Video footage from Saito City in Miyazaki Prefecture showed rain intensifying and visibility deteriorating as the weather worsened. Forecasters noted that one of the defining characteristics of this typhoon is the potential for heavy rain to continue over the same locations for extended periods.
Moist air flowing in from the southeast around the typhoon is expected to collide with mountainous terrain, generating persistent upward air currents and sustaining intense rainfall. Areas particularly vulnerable to this pattern include the Pacific coast of Kyushu, especially the Osumi Peninsula and Miyazaki Prefecture, as well as coastal regions of Kochi, southern Tokushima, and parts of the Kii Peninsula.
Unlike rainfall associated with seasonal fronts, which often fluctuates in intensity over several hours, typhoon-related downpours can continue without interruption. Meteorologists warned that rainfall rates could exceed 50 to 60 millimeters per hour in some locations, with very heavy rain persisting for long periods.
Accumulated rainfall totals are expected to rise significantly through June 4th. Forecast maps indicate that some areas in western Japan could receive more than 300 millimeters of rain, with parts of eastern Japan and the Tokai region also at risk of exceeding that threshold.
Weather officials are calling for continued vigilance as the storm moves northward, urging residents to closely monitor the latest forecasts and evacuation information while preparing for the possibility of serious rain-related disasters.
Source: ウェザーニュース
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