
Seasonal rain front bringing intense rain over wide regions in Japan
Japanese weather officials on Monday said a stationary rain front has destabilized atmospheric conditions from Tohoku, northern Japan, to Kyushu, southwestern Japan, triggering torrential downpours and stormy conditions.
The conditions will likely remain unstable overnight. The officials are urging people to be on the alert for landslides, flooding in low-lying areas and swollen rivers.
The Japan Meteorological Agency says the unstable conditions are due to warm moist air flowing toward the stationary seasonal rain front.
Developed rain clouds have formed above some areas, including Wakayama and Nagano prefectures and northern Kanto.
In Sugadaira, Nagano Prefecture, 39.5 millimeters of rain fell in the one-hour period through 1:20 p.m.
Shingu City, Wakayama Prefecture, had 36 millimeters from 1 p.m. to 2 p.m.
Takayama City, Gifu Prefecture, was hit with about 186.5 millimeters during a 12-hour period to 2 p.m. The amount is more than the average for the entire month of June.
The front will remain stationary overnight through Tuesday, and atmospheric conditions will likely remain destabilized. Downpours of 50 millimeters per hour may fall in some regions in eastern and western Japan.
Weather officials are also warning of thunder strikes and freak winds, including tornadoes.

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NHK
5 days ago
- NHK
Seasonal rain front bringing intense rain over wide regions in Japan
Japanese weather officials on Monday said a stationary rain front has destabilized atmospheric conditions from Tohoku, northern Japan, to Kyushu, southwestern Japan, triggering torrential downpours and stormy conditions. The conditions will likely remain unstable overnight. The officials are urging people to be on the alert for landslides, flooding in low-lying areas and swollen rivers. The Japan Meteorological Agency says the unstable conditions are due to warm moist air flowing toward the stationary seasonal rain front. Developed rain clouds have formed above some areas, including Wakayama and Nagano prefectures and northern Kanto. In Sugadaira, Nagano Prefecture, 39.5 millimeters of rain fell in the one-hour period through 1:20 p.m. Shingu City, Wakayama Prefecture, had 36 millimeters from 1 p.m. to 2 p.m. Takayama City, Gifu Prefecture, was hit with about 186.5 millimeters during a 12-hour period to 2 p.m. The amount is more than the average for the entire month of June. The front will remain stationary overnight through Tuesday, and atmospheric conditions will likely remain destabilized. Downpours of 50 millimeters per hour may fall in some regions in eastern and western Japan. Weather officials are also warning of thunder strikes and freak winds, including tornadoes.


NHK
16-06-2025
- NHK
Unstable weather, high temperatures forecast for western Japan
Japanese weather officials say unstable atmospheric conditions will likely bring localized downpours to northern Kyushu through Tuesday morning. The Meteorological Agency says a low-pressure system accompanied by a rain front is expected to move from western to northern Japan through Tuesday. The agency says warm, damp air and rising temperatures will make atmospheric conditions very unstable. Some parts of western Japan will likely have downpours of more than 30 millimeters per hour through Tuesday morning. Up to 100 millimeters of heavy rain may fall in the 24-hour period until Tuesday morning in northern Kyushu. The agency is calling for caution against mudslides, flooding in low-lying areas, swollen rivers, lightning strikes and strong gusts such as tornadoes. People are also advised to seek shelter in sturdy buildings if there are signs of thunderclouds approaching. Weather officials warn that temperatures will likely soar in western to eastern Japan on Monday. They forecast daytime highs of 36 degrees Celsius in Niihama City, Ehime Prefecture and 35 degrees in the cities of Takamatsu, Okayama and Toyooka, Hyogo Prefecture. Heatstroke alerts have been issued for the prefectures of Wakayama and Kagawa, the Amami region of Kagoshima Prefecture and the Yaeyama region of Okinawa Prefecture. Temperatures are expected to remain high throughout the week. People are advised to take precautions against heatstroke, such as using air conditioners and consuming lots of water and adequate amounts of salt.


Japan Times
12-06-2025
- Japan Times
In the forecast for June — a lot of talk about the weather
This week, the 気象庁 ( Kishōchō , Meteorological Agency) announced rainy season had 'likely' begun in the Kanto-Koshin and Hokuriku regions, with areas south of that entering the period known as 梅雨 ( tsuyu , rainy season) days prior. The word 梅雨 is made up of two kanji: 梅 ( ume , plum) and 雨 ( ame , rain). The latter kanji, 雨, is an obvious choice. Look out your window for most of June and you'll see a lot of rain.