Weather for the week: The autumn rain front will remain stationary and the weather will be rainy. Be careful of landslides caused by prolonged rain.

2026/09/07 19:09

Regarding the weather for the next week, the autumn rain front will remain stationary near Honshu, and it is likely that rain and cloudy weather will continue from Tohoku to western Japan.
Due to the influence of warm, humid air flowing in from the tropical cyclone that replaced Typhoon No. 24, the frontal activity will increase, causing heavy rain locally, mainly on the Pacific side. Please check the latest information.



Tomorrow, the 8th (Tuesday), a tropical cyclone south of Japan, which has changed from Typhoon No. 24, is expected to move northward and approach the south of Shikoku. This tropical cyclone will bring in warm, moist air, leading to increased frontal activity. In eastern and western Japan, heavy or extremely heavy rain is expected to occur in some places, especially in the Shikoku region and other parts of the Pacific Ocean. If the developed rain clouds continue to form, there is a possibility of warning-level heavy rain.
Please be careful about flooding of low-lying land, rising river water, and landslides.



The next day, from Wednesday the 9th to Thursday the 10th, the tropical cyclone that changed from Typhoon No. 24 will turn into an extratropical cyclone and is expected to move eastward along the front.
Warm and humid air will continue to flow towards the front, and the front will continue to be active. Atmospheric conditions will become unstable, and there will be places in eastern and western Japan where there will be heavy or extremely heavy rain accompanied by localized thunderstorms.
There are places where the ground has become loose due to previous rain, and even a small amount of rain can increase the risk of landslides.
Please continue to be vigilant.

Even after the 11th (Friday), due to the front staying near Honshu and the effects of a trough in atmospheric pressure, moist air will flow into Honshu, making it likely that rain will continue.

Hokkaido and Okinawa are expected to have some sunny days during this period.




Temperatures in the Kanto region are expected to reach 30c or higher again around Wednesday the 9th, and 33c in Tokyo.
In the Tokai region and western Japan, temperatures are expected to rise around the 13th (Sunday), and Kagoshima will experience an extremely hot day of 34c.
It may feel hot and humid, so don't overdo it, don't forget to hydrate yourself, take breaks, and use the air conditioner appropriately.

The Izu Islands experienced unprecedented heavy rain A tropical cyclone transformed from Typhoon No. 24 is expected to move eastward along the southern coast of Honshu

2026/09/07 17:28

A low pressure system is located on the Pacific coast of the Tohoku region and is moving north-northeast, and a front from the low pressure system is extending off the coast of Shikoku. Warm, humid air moving north on the east side of the tropical cyclone that changed from Typhoon No. 24 is flowing toward the front, and the front is becoming more active.
As a result, the Izu Islands are experiencing record-breaking heavy rainfall, with some places experiencing rainfall in the 24 hours up to 3:00 p.m. on the 7th, exceeding the amount of rainfall in one month of September in a normal year.

The low pressure system will move from the coast of Sanriku to the waters near Chishima until the 8th. The front extending from the low-pressure area off the coast of Shikoku is expected to move northward and become stationary on the Pacific side of western to eastern Japan until around the 10th. The tropical cyclone that changed from Typhoon No. 24 is expected to move northward from the south of Japan and turn into a frontal cyclone near western Japan on the 9th.



Warm and humid air moving northward on the east side of the tropical cyclone will continue to flow toward the front, making the atmospheric condition extremely unstable and leading to increased frontal activity.
For this reason, heavy rain will continue until around the 10th, and total rainfall may increase mainly from the Pacific side of western to eastern Japan.



In the Izu Islands, a Level 5 landslide special warning has been announced. The heavy rain is unprecedented, and there is a high possibility that some kind of disaster has already occurred, and lives are in danger. Please immediately ensure your safety and take maximum precautions against landslides.



Also, near-term forecasts for linear precipitation belts have been announced for the Izu Islands. In the future, there is a risk that linear precipitation bands will occur and the risk of heavy rain disasters will increase rapidly.
On the Pacific side of eastern Japan, please be on high alert for landslides through the 8th, and be wary of flooding of low-lying land, rising water levels, and flooding of rivers.

Immediate prediction of linear rain belt within the next 3 hours in the Izu Islands

2026/09/07 15:55

According to the Japan Meteorological Agency's announcement at 2:18 p.m., a linear precipitation band will form in the northern part of the Izu Islands in Tokyo within the next three hours, increasing the possibility that very heavy rain will continue to fall in the same area. The risk of a life-threatening disaster may increase rapidly.
Please take extra precautions against heavy rain until early evening.



Typhoon No. 24 turned into a
tropical cyclone near Minami Daito Island at 9:00 on the 7th.
Also, a front extending from the southern coast of Honshu to the east of Japan is slowly moving north. Warm, humid air moving north on the east side of the typhoon is flowing toward the front, increasing frontal activity.
As a result, the Izu Islands are experiencing record-breaking heavy rainfall, with some places experiencing 24-hour precipitation exceeding the average September month's worth of precipitation.

A level 5 special landslide warning has been issued for the northern part of the Izu Islands, and a level 4 landslide warning has been issued for the southern part of the Izu Islands.
It would not be surprising if some kind of disaster had already occurred.



There is a risk of a linear precipitation band in the future, and even if a linear precipitation band does not occur, it is predicted that heavy rain will continue.
Immediately move away from low-lying areas and near rivers,
evacuate from cliffs and slopes, etc.
Immediately ensure your own safety and take actions to protect your life.

Level 5 landslide special warning announced for Niijima Village in the Izu Islands. Maximum alert for landslides. Linear rain belt may occur in Tohoku.

2026/09/07 07:03

As of 06:00, Typhoon No. 24 is located approximately 50 km north-northeast of Minami Daito Island and is moving north-northeast at a speed of 10 km. Additionally, a front extending from the southern coast of Honshu to the east of Japan is slowly moving north.

Warm, humid air moving north on the east side of the typhoon is flowing towards the front, increasing activity at the front. As a result, rain clouds that have developed since yesterday, the 6th, have continued to hang over the Izu Islands, and as of 6 a.m., 548.0 mm/24 hours were observed in Oshima-cho, Tokyo (September normal: 341.3 mm), and 393.0 mm/24 hours in Niijima-mura, Tokyo (September normal: 195.1 mm), making it a record heavy rain with 24-hour precipitation exceeding the amount of precipitation for one month of September in a normal year. For this reason, a Level 5 landslide special warning has been issued for the Izu Islands, which is experiencing heavy rain unlike anything the region has ever experienced.



The front is expected to slowly move northward from eastern Japan to the Pacific side of western Japan, and become mostly stationary around the 10th (Thursday). Additionally, a low pressure system is expected to form off the coast of Sanriku on the front by the evening of today, the 7th. Typhoon No. 24 is expected to become a tropical cyclone on the morning of today, the 7th, moving northward from the south of Japan, and turn into a frontal cyclone near western Japan tomorrow, the 9th (Wednesday).



Warm, humid air moving north on the east side of the typhoon or tropical cyclone will continue to flow toward the front, making atmospheric conditions extremely unstable and frontal activity likely to increase. As a result, extremely heavy rain of over 50mm per hour is expected to occur, accompanied by thunderstorms, resulting in heavy rain in some places. In areas where the ground has become loose due to previous heavy rains, even a small amount of rainfall can increase the risk of landslides.

Please exercise maximum caution against landslides in the Izu Islands, where a Level 5 landslide special warning has been issued. On the Pacific side of eastern Japan and the Pacific side of Tohoku, strict vigilance is required for today, the 7th, against landslides, flooding of low-lying areas, and rising and flooding rivers. Please be aware of landslides, flooding of low-lying areas, and rising river waters from the 8th (Tuesday) in northern Japan, the 9th (Wednesday) in western Japan, and the 10th (Thursday) in eastern Japan.
Also, when a developed cumulonimbus cloud approaches, you should be careful of strong gusts of wind such as lightning and tornadoes. There is also a risk of hail, so please be careful when managing crops and agricultural facilities.
In the Nansei Islands, you should also be careful about strong winds and high waves accompanied by swells.

#Expected amount of rain (in areas where there is a lot)
+Precipitation expected for 24 hours by 6:00 tomorrow, the 8th (Tuesday)
Tohoku region 200mm
Kanto-Koshin region 180mm
Tokai region 150mm
Kinki region 150mm
Southern Kyushu 80mm
+24-hour precipitation expected by 6:00 a.m. on Wednesday the 9th
Kanto-Koshin region 100mm
Tokai region 150mm
Kinki region 150mm
+24-hour precipitation expected by 6:00 on the 10th (Thursday)
Kanto Koshin region: 80mm
Tokai region: 150mm
Kinki region: 150mm
If a linear precipitation band occurs, there is a risk that the amount of rainfall will increase locally.
The following are the regions and periods where linear precipitation bands may occur and the risk of heavy rain disasters may increase rapidly.
(Tohoku Region) Iwate Prefecture: From late morning to early evening today, the 7th
(Tohoku Region) Miyagi Prefecture: From morning to evening today, the 7th
(Tohoku Region) Fukushima Prefecture: From daybreak to early afternoon today, the 7th

#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected on today 7th
Amami region 15 meters (25 meters)
Okinawa region 15 meters (25 meters)

#Expected wave height (with swells)
+Expected wave height for today 7th
Amami region 4 meters
Okinawa region 4 meters

Depending on the trends of fronts and low pressure systems, heavy rain may continue until around the 10th (Thursday), and total rainfall may increase mainly from the Pacific side of western to eastern Japan. Please check the latest weather information as the risk of disasters may continue to increase in areas where the total amount of rainfall has increased.

Weather for today, the 7th (Monday): Autumn rain front moving north; heavy rain warning for Tohoku and Kanto

2026/09/07 06:32

Today, the 7th (Monday), the autumn rain front is expected to move northward and frontal activity will increase. It rains easily across the country, and there is a risk of heavy rain in the Pacific side of Tohoku and the Kanto region, so vigilance is required.



In Hokkaido, there is a possibility of showers in the afternoon mainly on the Pacific side and southern Hokkaido. It's more likely to rain late at night, so if you're returning home late, it's a good idea to bring a folding umbrella. It looks like it will be a sunny and pleasant day in northern Hokkaido.

Rain is expected to be widespread in Tohoku and eastern Japan. Especially on the Pacific side of Tohoku, there is a risk of extremely heavy rain accompanied by thunder, peaking around noon. Heavy rain is reaching its peak in the Kanto and Tokai regions, but there is a possibility that transportation may be disrupted by the rain. Please be sure to take your actions with plenty of time.

Kinki, Chugoku, and Shikoku are also prone to rain. It will be safe to have rain gear when you go out.
Kyushu is also prone to clouds and showers, so it's a good idea to bring a foldable umbrella.

Okinawa continues to experience strong winds due to Typhoon No.24. Please be careful as waves can be strong in coastal areas. It looks like there will be time for sunlight to reach the Sakishima Islands.

The autumn rain front is moving north little by little, and there is a risk of warning-level heavy rain over a wide area from Tohoku to southern Kyushu and the Amami region.

2026/09/06 18:29

The autumn rain front is stationary in the south of Honshu. Very warm and humid air from the tropics is flowing toward the front, and the front is becoming more active in the Pacific Ocean region.



In addition, as of 3:00 pm today, the 6th (Sunday), Typhoon No. 24 is moving slowly eastward west of Minami Daito Island. Typhoon No. 24 will continue to move toward the northeast at a slow speed, but it is expected to turn into a tropical cyclone after 3:00 pm tomorrow, the 7th (Monday).



Meanwhile, near Honshu, warm, humid air brought in by the typhoon is flowing toward the front, and the front is expected to move northward little by little starting tonight. As a result, rain will become heavier over a wide area from western Japan to eastern Japan and the Tohoku region. There is a risk of warning-level heavy rain over a wide area from Tohoku to southern Kyushu and the Amami region into tomorrow, the 7th (Monday).

In particular, there is a risk that a linear precipitation band will occur in the Kanto-Koshin and Tokai regions from tonight until the morning of the 7th, and in the Tohoku region from early morning to late at night on the 7th.
When a linear rain belt occurs, heavy rain continues in the same area, and the risk of serious landslides, flooding, and river flooding that can be life-threatening increases rapidly.




According to the current forecast, the peak of the rain is expected to occur from tonight until the morning of tomorrow, the 7th (Monday) in the Kanto-Koshin and Tokai areas. In the Kanto-Koshin and Tokai regions, heavy rain is expected to occur during the morning commuting hours, significantly impacting transportation. Please pay attention to the latest traffic information.



After that, the area of heavy rain is expected to move northward across the Tohoku region. On the Pacific side of the Tohoku region, there will be localized areas with extremely heavy rain of over 50mm per hour.



Please be extremely cautious of landslides, flooding of low-lying areas, and rising and flooding rivers. The situation may worsen during the dark hours from late tonight until dawn on the 7th, so please avoid unnecessary outings as much as possible and stay safe indoors. Also, please pay attention to disaster prevention information such as evacuation information released by local governments.

Also, from the 8th (Tuesday) onward, the autumn rain front will remain stationary near Honshu, and it is expected that there will be many rainy days nationwide. Depending on the position of the front and the degree of development of rain clouds, there is a possibility of locally heavy rain even after the 8th (Tuesday), so please be sure to check the latest weather information that will be updated in the future.

Linear precipitation band forecast for half a day ahead in Kanto and Tokai; atmospheric instability as front moves northward

2026/09/06 12:42

An autumn rain front is extending from the southern coast of Honshu to the east of Japan, passing near the Izu Islands.
The front is expected to remain mostly stationary near the Izu Islands today, the 6th, and then move north toward Honshu into the 7th. The atmospheric conditions will be extremely unstable due to the influence of the front and warm, humid air flowing towards the front from Typhoon No. 24 near the Nansei Islands, leading to heavy rain in some places through the 7th.





Today, at 10:44 a.m., the Japan Meteorological Agency announced a half-day-a-day forecast for linear precipitation bands.
In the Kanto-Koshin and Tokai regions, it is predicted that
a linear precipitation band will occur, rapidly increasing the risk of heavy rain disasters.



Please be on high alert for flooding/flooding of low-lying land and underpasses,
rising and overflowing rivers, and landslides.
Also, please pay attention to disaster prevention weather information that will be announced in stages and information such as "Kikikuru" that can be viewed from the Japan Meteorological Agency website.

[Linear rain belt half a day ahead forecast] Linear rain belt may occur in Kanto-Koshin region and Tokai region

2026/09/06 12:20

Today, the 6th (Sunday), the Japan Meteorological Agency announced a "half-day-ahead forecast for linear precipitation bands," stating that there is a possibility that linear precipitation bands will form in the Kanto-Koshin and Tokai regions in the future, and the risk of heavy rain will rapidly increase.

A linear precipitation belt is a phenomenon in which well-developed cumulonimbus clouds form one after another, causing heavy rain to continue in similar locations. When linear rain bands occur, the risk of life-threatening heavy rain disasters such as serious landslides, flooding, and river flooding increases rapidly, making it extremely dangerous.

In the south of Honshu, the autumn rain front continues to remain stationary. Until yesterday, the 5th (Saturday), the tropical cyclone that was moving north over the sea south of Honshu had become obscured, but Typhoon No. 24 is moving at a slow speed over the sea east of Okinawa.





Warm, humid air is flowing towards the Autumn rain front, activating frontal activity, and the front is expected to slowly move northward from tonight until tomorrow the 7th.
In the Kanto-Koshin and Tokai regions, rain clouds will develop from tonight until the morning of the 7th (Saturday), and extremely heavy rain of over 50mm per hour will fall in some places.

The following are the regions and periods where linear precipitation bands may occur and the risk of heavy rain disasters may increase rapidly.

Kanto-Koshin region Tokyo region From late night of the 6th to before noon of the 7th
Kanto-Koshin region Izu Islands From before noon of the 6th to early morning of the 7th
Kanto-Koshin region Saitama Prefecture From late night of the 6th to early noon of the 7th
Kanto-Koshin region Kanagawa Prefecture From late night of the 6th to early noon of the 7th
Kanto-Koshin region Chiba Prefecture From late night of the 6th to before noon of the 7th
Tokai region, Shizuoka prefecture From early evening of the 6th to early noon of the 7th
Tokai region, Aichi prefecture From early evening of the 6th to early morning of the 7th
Tokai region, Mie prefecture From the beginning of the night of the 6th to the morning of the 7th,

Please further increase your preparedness for heavy rain and carefully check the disaster prevention weather information and Kikikuru risk distribution that will be announced in stages.

Today, the 6th (Sunday), it will rain from Kyushu to the southern part of Tohoku. There is a risk of heavy rain in the Kinki region and southern Tohoku region from this late afternoon until tomorrow the 7th (Monday).

2026/09/06 07:35

Today, the 6th (Sunday), the autumn rain front will gradually move northward. Heavy rain is expected to occur in western and eastern Japan, mainly on the Pacific side, and there will also be periods of rain on the Sea of Japan side. It looks like the weather will require an umbrella when going out.



Also, there will be heavy rain in some parts of the Kinki region and southern Tohoku region from this late into tomorrow, the 7th (Monday). Particularly in the Kanto region, it is likely that some places will receive as much rain as September in a normal year. Strict vigilance must be taken against landslides, flooding of low-lying areas, and rising and flooding rivers. In addition, there is a possibility that a linear precipitation band may occur in the Izu Islands from noon today on the 6th until dawn on the 7th tomorrow.




The predicted precipitation in each area is as follows.

[Rain Forecast]
The predicted 24-hour precipitation from 6:00 on the 6th to 6:00 on the 7th is high in the Kanto-Koshin region,
250mm
Tokai region 300mm
Kinki region 200mm
Shikoku region 150mm
Southern Kyushu 150mm
/ After that, the predicted 24-hour precipitation from 6 o'clock on the 7th to 6 o'clock on the 8th will be high in some places,
Tokai region 200 mm
Kinki region 1 It is expected to be 20mm
, Tohoku region, 200mm
, Kanto region, 150mm
, Izu Islands, 100mm

.

On the other hand, in Hokkaido and northern Tohoku, which are within the high-pressure zone, the sun will reach us today, and there will be no major changes in the weather.
Even if it's blisteringly hot during the day, you'll feel cool in the mornings and evenings. Please take care of your physical condition as your physical sensation will change significantly.

It will rain in many places in northern Tohoku tomorrow.

The autumn rain front is heading north again, and there is a risk of heavy rain in Kyushu and Tohoku from tomorrow 6th (Sunday) to 8th (Tuesday)

2026/09/05 22:48

Typhoon No. 24 will head south of Okinawa until the 6th (Sunday), then make a U-turn and slowly move northward near the Nansei Islands until the evening of the 7th (Monday), gradually turning into a tropical cyclone. Additionally, another tropical cyclone south of Japan is expected to continue moving north.



Additionally, the front that is stationary near the southern coast of Honshu is expected to remain mostly stationary until the 6th (Sunday), and gradually move northward on the 7th (Monday). Warm, moist air from around typhoons and tropical cyclones will flow toward the front, making the front very active.



Extremely heavy rain accompanied by thunder and lightning will fall on the Pacific coast of Okinawa, Amami, Kyushu and Tohoku into the 7th (Monday), with the risk of warning-level heavy rain.




After that, the total rainfall may increase until the 8th (Tuesday) depending on the path of the typhoon (or tropical cyclone) and the movement of the front.

The expected precipitation is as follows:

[Rain Forecast]
Expected 24-hour precipitation up to 6:00 pm on the 6th will be heavy in areas
Kanto-Koshin region 15 0mm
Tokai region 200mm
Kinki region 150mm
Shikoku region 120mm
r Southern Kyushu 180mm
Amami region 80mm
Okinawa region 150mm

After that, the predicted 24-hour precipitation from 6:00 PM on the 6th to 6:00 PM on the 7th is expected to be 200 mm
in the Kanto-Koshin region. Tokai region 300mm
Kinki region 200mm
Shikoku region 200mm
Kyushu Southern area 120 mm
Tohoku region 200 mm
24-hour precipitation is high in the Kanto-Koshin region, 80 mm
, Tokai region, 120 mm
, and the Kinki region. It is expected to be 100mm
in the Shikoku region, 100mm
in the Tohoku region, and 80mm

in the Tohoku region.

There will be heavy rain in some places, mainly on the Pacific side of eastern Japan, such as the Kanto and Tokai regions, from the 7th (Monday) to the 8th (Tuesday), exceeding the average rainfall in a single month in September. Please be extremely careful about landslides, flooding of low-lying land, flooding of roads, and rising river waters.