[Beware of heavy rain early in the rainy season] Fear of warning-level heavy rain again on Kyushu 7th (Sunday) (Commentary: Weather forecaster Atsuko Miyake)

2026/06/04 14:45

Today, June 4th (Thursday), it was announced that the rainy season seems to have begun in northern Kyushu.
In northern Kyushu, the rainy season started 19 days later than last year, which is the same as in normal years.



The announcement of the start of the rainy season is also a notice that "the heavy rain season is almost here."
Let's once again check the evacuation route and check the disaster prevention goods.



Live weather map.
Yesterday night, Typhoon No. 6 became an extratropical cyclone over the sea east of Kanto.
A new low pressure system has formed on the front where this low pressure system extends.
This low pressure system and front are approaching the Kyushu region.



Let's take a look at the rain clouds.
Live commentary at 11am.
There are active rain clouds in the Kyushu region, mainly in the south.
More than 10mm of heavy rain has been observed in Miyazaki and Kagoshima prefectures in the past hour.



Let's take a look at the rain clouds after this.
I'll watch it from 3pm.
In southern Kyushu, there are orange and red signs.
There is a risk of very heavy rain in some places, accompanied by thunder.
Very heavy rain is rain that can't keep up with drainage in urban areas.
It is expected to rain so quickly that the roads will turn into rivers.



Furthermore, there are red signs even in Kumamoto Prefecture towards night.
There is a risk of heavy rain accompanied by thunder.
Be careful of heavy rain with thunder, lightning strikes, and gusts of wind late at night.
The active rain clouds are expected to leave Kyushu by the time the date changes.
And there will still be some rain left in the morning, but it looks like the rain will stop in most places in the morning.
The weather looks like it will improve during the day tomorrow.



, we will take a look at the detailed weather of each place.
There will be some rain tomorrow until morning.
During the day, the sun will return and the temperature will rise to around 30 degrees in some places.
The heat will return at once tomorrow, so
Please take sufficient precautions against heat stroke before heading out.



Weekly forecast.
Saturday the 6th will be sunny in many places.
It will be Sunday the 7th. The next low pressure system or front is approaching.
There is a risk of heavy rain in the Kyushu region again.
It looks like there will still be some rain on the 8th.
There will be some sunny spells after the 9th, but Miyazaki and Kagoshima are likely to experience rainy weather due to the influence of the rainy season front.

[Rainy season begins in Northern Kyushu, Chugoku, and Kinki] Early on the 7th (Sunday), warning level heavy rain begins. Prepare for the next rain (Commentary: Weather forecaster Atsuko Miyake)

2026/06/04 13:49

Today, June 4th (Thursday), it was announced that the rainy season appears to have begun in northern Kyushu, the Chugoku region, and the Kinki region.



Northern Kyushu is on par with normal years,
The Chugoku region and Kinki region entered the rainy season two days earlier than normal. (Preliminary figures)

This announcement of the start of the rainy season also means that
``It's the beginning of the full-fledged heavy rain season.''
Let's take another look at disaster prevention goods and confirm evacuation routes.



Let's take a look at the live weather map.
Typhoon No. 6 turned into an extratropical cyclone over the sea east of Kanto yesterday night.

The low pressure system that evolved from this typhoon is still east of Kanto, and strong winds continue on the Pacific side of eastern Japan and
on the Pacific side of Tohoku.

Please be careful of strong winds into today's evening.

And another low pressure system is forming on the front where this low pressure system extends.
This low pressure system and front are approaching from the west of Kyushu.



Let's take a look at the rain cloud situation.
Live commentary at 11am.
Rain clouds are covering Kyushu, the Chugoku region, and the Shikoku region.

There are particularly active rain clouds over the southern part of Kyushu, with heavy rain exceeding 10mm per hour observed.



Now, let's take a look at the rain clouds.

We'll be watching from 3pm.
There are orange and red markings, especially in southern Kyushu.

There is a risk of very heavy rain with thunder.
There is a risk of rain falling like waterfalls, so please be careful about how it rains.



From evening to night, rain clouds will begin to cover the Shikoku and Kinki regions.

There is a risk that there will be even more heavy rain in areas where there was heavy rain due to the recent typhoon.

Please be aware that even a little rain increases the risk of landslides.

The active rain clouds are expected to gradually move out over the sea by tomorrow morning.
We don't expect these active rain clouds to cover eastern Japan.



Let's take a look at the forecast weather map for the next week.

A tropical cyclone will move into the East China Sea on Saturday.
We predict that there will be a seasonal rain front further north.

From now until Sunday the 7th,
the tropical cyclone is expected to merge with the seasonal rain front and approach western Japan, including Kyushu.
Very warm and humid air is expected to flow in from the south towards this low pressure system and front,
again bringing warning-level heavy rain to western Japan.
Please be careful as there will be heavy rain early in the rainy season.



, we will look at the detailed weather of each place.

Tomorrow, it will rain in many places in western Japan until morning.
During the day, the sun will return and temperatures in western Japan are likely to rise to nearly 30 degrees.


On the other hand, on the Pacific side of eastern Japan and Tohoku, there are many clouds due to the influence of humid air.
It's not expected to be that hot here.



Weekly forecast.

Another low pressure system will approach northern Japan on the 6th (Saturday), and it is likely to rain in many places on the Sea of Japan side of northern Japan.
On the 7th (Sunday), there is a risk of warning-level heavy rain mainly in western Japan.


In addition, from the 8th (Monday) to the 9th (Tuesday), there is a risk that both rain and wind will become stronger in eastern and northern Japan.
Please continue to pay attention to the latest information.

Estimated rain intensity and direction for the coming season

2026/06/04 13:23

The rainy season has gradually entered Western Japan, and Typhoon No. 6 brought heavy rain mainly to areas on the Pacific side.
From now on, it will be rainy season. When I look at the weather forecast, I hear expressions such as ##mm of rain per hour, but it's hard to imagine how heavy the rain will be. I have summarized the strength of the rain and how it falls. Please refer to it if you like.

+1mm of rain per hour
This means that water accumulates on the ground to a depth of 1mm in 1 hour.
Many people probably don't use umbrellas because of the foggy rain.

+Over 2mm of rain per hour
Most people carry umbrellas.

+Over 5mm of rain per hour
Puddles form.

+Over 10mm of rain per hour
Your feet will get wet from the rain bouncing off the ground.
It's hard to hear voices outdoors due to the sound of rain.

+Over 20mm of rain in one hour
Even with an umbrella, you will get wet.
Some people may wake up to the sound of rain while sleeping.

+Over 50mm of rain per hour
Umbrellas become completely useless.
Water spray makes the area look gray and visibility becomes poor.
Driving a car is dangerous.

+More than 80mm of rain per hour
There is a feeling of pressure that makes it hard to breathe, and I feel scared.
There is a high risk of disasters occurring due to rain, so strict vigilance is required.

Due to Typhoon No. 6, more than 50mm of rain fell in one hour in some places, and there is a fear that there will be heavy rain locally due to the typhoon and the rainy season. Be prepared for disasters by checking not only whether it will rain, but also how much it will rain.

Temperatures trending higher than normal nationwide Typhoon No. 6 occurs near the Caroline Islands (weather summary May 24th to May 30th, 2026)

2026/06/04 07:11

This is a summary of the weather for this period (May 24th to May 30th, 2026).

#Summary of the weather for this period (May 24th to May 30th)
Average temperatures tended to be much higher than normal nationwide, as warm air easily entered the skies above Honshu. From the Tokai region to Kyushu, many places experienced severe heat that was more than 3 degrees Celsius above normal, and in northern Japan, the temperature was nearly 4 degrees Celsius above normal in Abashiri.

Precipitation was above normal in southern Kyushu and the Amami region, which were susceptible to the effects of seasonal rain fronts and humid air, and above normal in northern Japan, which was susceptible to the effects of low pressure systems, fronts, and cold air in the upper atmosphere. On the other hand, eastern Japan was less affected by low pressure systems and fronts, resulting in significantly less rainfall than normal.

From the Kanto region to the Chugoku region, there were many relatively sunny days, and the sunshine hours tended to be around normal or slightly above normal. Northern Japan, southern Kyushu, Okinawa and Amami had many cloudy and rainy days due to the influence of low pressure systems and fronts, so many places had temperatures below normal.



[About this period's weather]
#Characteristics of pressure distribution
On the 24th, a low pressure system moved northeast over the northern Sea of Japan. Through the 25th, a front was stationary in an east-west direction from central China to the East China Sea and far east of Japan, and a low-pressure system above the front moved eastward south of Honshu. On the 26th, a new low pressure front formed in central China and moved east toward the East China Sea. A tropical cyclone has formed near the Caroline Islands in the ocean far south of Japan. On the 27th, a frontal low pressure system passed from the East China Sea to near Shikoku. Typhoon No. 6 formed near the Caroline Islands around 9 a.m. and moved northward. On the 28th, the low pressure front continued to move eastward along the southern coast of Honshu. Another low pressure system is moving eastward from the continent in the Sea of Japan. On the 29th, the front extending from the low pressure system in the Sea of Japan merged with the front south of Honshu, and the low pressure system rapidly developed as it moved towards the Sea of Okhotsk. Typhoon No. 6 moved northward over the eastern seaboard of the Philippines, and the rainy season front remained stationary near the Nansei Islands until the 30th. On the other hand, on the 30th, the area around Honshu entered a high-pressure zone from western Japan to eastern Japan.

#Precipitation
On the 24th, it rained mainly from Hokuriku to the Sea of Japan side of northern Japan due to the influence of a low pressure system moving in the northern part of the Japan Sea. Rain continues in Okinawa due to the rainy season front, and heavy rain was observed on Kumejima. On the 25th, rain continued, mainly in Okinawa, where the seasonal rain front was stationary, and on the 26th, active rain clouds formed mainly in the Amami region, causing heavy rain. On Kikaijima Island in Kagoshima Prefecture, extremely heavy rain was observed with an hourly rainfall of 67.5 mm, breaking the record for May. On the 27th, rain fell mainly in southern Kyushu and the Amami region due to the effects of a low pressure system and a front, with 70.0 mm of rainfall per hour observed in Sata, Minamiosumi-cho, Kagoshima Prefecture, and heavy rain warnings and landslide warning information were announced. On the 28th, rain fell mainly in western Japan due to the influence of a low pressure front. Rain is also occurring in Hokuriku and northern Japan due to another low-pressure system moving through the Sea of Japan. On the 29th, heavy rain was observed in Bihoro Town and Higashimokoto, Hokkaido due to the effects of a rapidly developing low pressure system. Rain is also expected to occur in eastern Japan, western Japan, and the Sakishima Islands due to the front. On the 30th, rain clouds developed locally in northern Japan due to the influence of cold air in the sky, and heavy rain briefly occurred in Aomori and Akita prefectures.

#Temperature
On the 24th, the area around Japan was covered with warm air, and it was a midsummer day in many places. The temperature rose to 32.5c in Saga and 32.2c in Hita City, Oita Prefecture. On the 25th, severe heat hit Western Japan, with temperatures rising to 34.9c in Kurume City, Fukuoka Prefecture. In Matsuyama, the flowering of hydrangeas was announced. On the 26th, temperatures continued to be higher than normal across the country, with temperatures in places such as Izumo City, Shimane Prefecture and Zaida, Mitoyo City, Kagawa Prefecture, reaching July levels, breaking the number one record for May. On the 27th, temperatures in western Japan fell from the previous day as it was cloudy and rainy, but temperatures rose in northern and eastern Japan. In Tohoku, the temperature rose to 32.0c in Yokote City, Akita Prefecture, making it a midsummer day. On the 28th, warm air in the sky caused temperatures to rise even in places covered by thick clouds, making it hot and humid. A temperature of 32.3c was recorded in Hotaka, Azumino City, Nagano Prefecture. From the 29th to the 30th, the area continued to be affected by warm air in the upper atmosphere, and in some places there was also an increase in temperature due to the Fohn phenomenon. In Fuchu City, Tokyo, the temperature rose to 33.7 degrees Celsius on the 29th, setting the highest temperature in May. On the 30th, the temperature in Kiryu City, Gunma Prefecture rose to 33.8c, making it extremely hot.

Typhoon No. 6 becomes an extratropical cyclone. Tomorrow, the 4th (Thursday), Kyushu should be careful of heavy rain again due to the influence of the front.

2026/06/03 22:52

At around 9 p.m. on the 3rd (Wednesday), Typhoon No. 6 turned into an extratropical cyclone over the sea east of Kanto. Although we have passed the peak of heavy rain, there is a possibility of heavy rain again in Kyushu and Shikoku.

The front is expected to remain near Kyushu tomorrow, the 4th (Thursday). As extremely warm and humid air flows towards the front, atmospheric conditions are expected to become extremely unstable, especially in Okinawa, Kyushu, and Shikoku.



It will rain in places in Okinawa and Kyushu from the morning, and active cumulonimbus clouds are likely to form, especially near Kyushu, due to the influence of warm and humid air heading towards the front. Please be careful of heavy rain accompanied by thunder. From the evening until night, it will rain in parts of Shikoku and the Kii Peninsula, and heavy rain is likely to occur in parts of Shikoku in the western part of Kochi Prefecture.
The heavy rain caused by Typhoon No. 6 has loosened the ground in some places, so please be careful of landslides.



On the Pacific side of the Kanto and Tohoku regions, there will be some places where the northerly wind will blow strongly, mainly in the coastal areas, tomorrow the 4th (Thursday). At sea, waves are expected to continue to be high with swells, and in some places the waves are expected to be over 5 meters high. Even after Typhoon No. 6 has passed, please be careful of high waves in coastal areas from the Tohoku Pacific side to the Kanto region.

Typhoon No. 6 moved east along the southern coast of Kanto. Strict warning for heavy rain until mid-afternoon

2026/06/03 11:51

As of 10 a.m., large-scale typhoon No. 6 is located approximately 50 kilometers west-southwest of Omaezaki City and is moving east-northeast at a speed of 40 kilometers per hour.



The rain peaks in the Tokai and Kanto regions from morning to midday, with linear precipitation bands occurring in the Izu region of Shizuoka Prefecture and eastern Kanagawa Prefecture. The peak of heavy rain is expected to continue until noon in the Tokai region and into the early afternoon in the Kanto region. It is necessary to be careful about flooding of low-lying land and underground facilities, and flooding of rivers.
Large typhoon No. 6 is expected to move eastward along the Kanto coast into the afternoon.



As of 11 a.m., active rain clouds are hanging over the Kanto region from Shizuoka Prefecture, and the rain is at its peak. In the morning, a linear precipitation band forms in Izu, Shizuoka Prefecture, and before noon, a linear precipitation band forms in eastern Kanagawa Prefecture.
Even in Tokyo, the risk of flooding is increasing, with a "Level 4 Flood Danger Warning" being announced for the Meguro River and Kanda River at one point.



The peak of heavy rain will continue until noon in the Tokai region and into the early afternoon in the Kanto region. It is necessary to be careful about flooding of low-lying land and underground facilities, and flooding of rivers. The rain will gradually stop after the evening, but rivers may swell or landslides may occur after the rain has stopped. Please do not approach dangerous areas until the warning has been lifted.

The wind is expected to blow strongly into the night, and people in Chiba Prefecture need to be on guard against strong winds.



Also, be careful of inland water flooding in the Kanto and Tokai regions into the afternoon.

Inland flooding is damage caused by flooding caused by heavy rain that falls in urban areas and overflows onto the ground. It is said to be more likely to occur in urban areas where most of the area is paved with asphalt.

Distinguished from ``outside water flooding,'' where water from a large river overflows over the embankment, ``inland water flooding'' is a disaster in which rainfall exceeds the drainage capacity of sewers and irrigation canals, or the water level of the river (mainstream) to which it is drained rises, causing rainwater that has no place to go and overflows into urban areas. Not only does water overflow from rivers and irrigation canals, but water can also gush out from manholes.

Compared to "outside water flooding," "inland water flooding" generally tends to have a shallower degree of inundation, but damage occurs in a short period of time, and flooding can occur even in areas far from rivers.

Please pay attention to information about upcoming typhoons.

Today's 3rd (Wednesday) weather: Stormy weather mainly in eastern Japan; weather recovery in western Japan

2026/06/03 06:34

Today, the 3rd (Wednesday), Typhoon No. 6 is expected to move eastward on the Pacific side of eastern Japan. Rain and wind have been increasing in eastern Japan since the morning, and there is a risk of rough weather. The weather in western Japan is likely to improve.



Typhoon No. 6 is moving east-northeast near Shionomisaki as of 5 o'clock.
Rain and wind are intensifying mainly on the Pacific side of eastern Japan, and a Level 3 heavy rain warning has been announced from Kanto to Kinki. There is a risk of extremely heavy rain of more than 50 mm per hour in the Tokai region in the morning and in the Kanto region in the early afternoon. In western Japan and the Pacific side of eastern Japan, be extremely cautious of landslides, and be on guard against strong winds, flooding of low-lying areas, and rising and flooding rivers.
Also, the wind is strong, especially in coastal areas, and transportation may be disrupted during rush hours. Please check the latest traffic information and refrain from going out unless necessary.

It will be sunny in many places in Hokkaido and northern Tohoku. Clouds will spread in the afternoon, but it doesn't look like the weather will deteriorate. Rain is likely to fall in the southern Tohoku region, and there is a risk of heavy rain, especially on the Pacific side. Please be careful of heavy rain disasters.

The weather will gradually improve in western Japan as the typhoon leaves. It looks like there will be some places where the sun will return in the afternoon.

Temperatures will be high mainly in sunny Hokkaido and western Japan, and in Asahikawa, Hokkaido, a midsummer day is expected to reach 31c. Even in western Japan, there are many places where the temperature can reach around 30c, and there are many places where the temperature exceeds 30c, especially on the Pacific side where the north wind blows down the mountains. Please be careful of heat stroke.
On the other hand, in the Tohoku and Kanto regions, where there is rain and little sunlight, the temperature rises slowly, and in central Tokyo it will feel chilly at 21 degrees Celsius.

Typhoon No. 6 approaches from western Japan to the Pacific side of eastern Japan; linear rain band may occur in Kanto as well

2026/06/03 00:44

As of 11:00 pm on the 2nd, Typhoon No. 6 is located approximately 70 km east of Cape Ashizuri and is moving northeast at a speed of approximately 45 km per hour.

#Typhoon No. 6 2nd (Tue) 23:00
==================/br Center Location Approximately 70km
east of Cape Ashizuri Movement Northeast 45km/h
Central pressure 980 hPa
Maximum wind speed 25 m/s (near the center)
Maximum instantaneous wind speed 35 m/s
==================



Typhoon No. 6 is expected to move eastward near the southern coast of Honshu today, the 3rd, and will approach the Pacific side of eastern Japan from western Japan.
Rain clouds will develop from the Pacific side of western Japan to eastern Japan from today, the 3rd, and there is a risk of extremely heavy rain of more than 50 mm per hour.
In the Shikoku, Kinki, Tokai, and Kanto-Koshin regions, there is a possibility that linear precipitation bands will occur and the risk of heavy rain disasters will rapidly increase.In the Pacific side of western Japan, please be on strict alert for landslides through today, the 3rd, and be on guard against flooding of low-lying areas, rising and overflowing rivers, and high waves accompanied by swells. In addition, on the Pacific side of eastern Japan, please be extremely vigilant for landslides, flooding of low-lying land, rising and overflowing rivers, and high waves with swells for today, the 3rd. Caution and vigilance are required on the Pacific side of Tohoku from today 3rd to tomorrow 4th (Thursday).

[Weather Phenomenon Forecast]
The following are the regions and periods where linear precipitation bands may occur and the risk of heavy rain disasters may rapidly increase.
Ibaraki (Kanto-Koshin region) From morning to evening on the 3rd today
(Kanto-Koshin region)) Tokyo region From dawn to early afternoon on the 3rd today
(Kanto-Koshin region) Izu Islands From dawn to early afternoon on the 3rd today
(Kanto-Koshin region) Kanagawa Prefecture, from dawn to early afternoon on the 3rd today
(Kanto-Koshin region) Chiba Prefecture, from dawn to evening on the 3rd today
Yamanashi Prefecture From dawn to early afternoon today 3rd day
(Tokai region) Shizuoka Prefecture Today 3rd day dawn From early morning until noon
Aichi Prefecture From early morning to early morning on the 3rd today
Mie Prefecture, Tokai region) From late at night on the 2nd to the morning on the 3rd today
(Kinki region) Nara Prefecture From late at night on the 2nd to the early morning on the 3rd today
(Kinki region) Wakayama Prefecture From late night on the 2nd to early morning today on the 3rd
(Shikoku region) Tokushima Prefecture Late on the 2nd night From the early hours of the 3rd of March
(Shikoku region) Kochi Prefecture From the late evening of the 2nd to the early hours of the 3rd of today




[Wind Forecast]
Very strong winds are expected to blow from western Japan to the Pacific side of eastern Japan and the Pacific side of Tohoku.

#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected for today 3rd
Tokai region 25m/s (35m/s)
Kinki region 25m/s (35m/s)
Chugoku region 20m/s(30m/s)
Shikoku region 25m/s (35m/s)
Tohoku region 20m/s (30m/s)
Kanto-Koshin region 25m/s (35m/s)
+Maximum wind speed (maximum instantaneous wind speed) expected for tomorrow 4th (Thursday)
Tohoku region 20m/s (3 0m/s)
20m/s (30m/s)

[Wave Forecast]
On the Pacific side of eastern Japan, the waves are expected to rise with swells and become violent.

#Expected wave height (with swell)
+Expected wave height for today 3rd
Tokai region 8m
Kinki Region 8m
Shikoku region 8m
Northern Kyushu 5m
Southern Kyushu 6m
Tohoku region 6m
Kanto-Koshin region 9m
+Estimated wave height for tomorrow 4th (Thursday)
Tohoku region 6m
Kanto-Koshin region 6m

[Rain Forecast]
Heavy to very heavy rain is expected to occur on the Pacific side of western Japan and the Pacific side of eastern Japan.

#Expected amount of rain (in areas where there is a lot)
+Precipitation expected for 24 hours by midnight tomorrow 4th (Thursday)
Tohoku region 120mm
Kanto-Koshin region 300mm
Tokai region 300mm
Kinki region 200mm
Shikoku region 150mm
If a linear precipitation band occurs, there is a risk that the rainfall will increase locally.

The rainy season has entered the Shikoku region, and the rainy season has entered western Japan.

2026/06/02 19:16

The Japan Meteorological Agency announced on June 2 that the Shikoku region appears to have entered the rainy season.
The rainy season started 3 days earlier than normal and 16 days later than last year.
Yesterday, the Japan Meteorological Agency announced that the rainy season seems to have entered southern Kyushu, and
Western Japan will soon enter the rainy season.

*In a normal year, the rainy season in Shikoku ends around July 17th
In a normal year, the rainy season in southern Kyushu ends around July 15th

There are disasters that are more likely to occur during the rainy season, such as floods and landslides. Check evacuation sites and evacuation routes, and use hazard maps to understand the disaster risks to your home in the event of a disaster. Roofs and walls need to be repaired, and drains need to be cleaned regularly to prevent rain leaks and flooding. Just in case, it's a good idea to have emergency food, drinking water, a radio, and a flashlight on hand. Precipitation in this year's rainy season is expected to be around average, but it will be higher than last year's dry rainy season. Locally heavy rain is possible. Before the rainy season begins in earnest, be sure to take precautions at home.

[Typhoon No. 6] Heavy rain expected over a wide area Afterwards, sluggish weather continues

2026/06/02 17:29

As of 3:00 p.m. on the 2nd, Typhoon No. 6 is located west-northwest of Tanegashima and is moving northeast at a speed of approximately 35 kilometers per hour. The central pressure is 980 hectopascals, the maximum wind speed is 25 m, and the maximum instantaneous wind speed is 35 m.



It will approach from the Amami region to southern Kyushu this evening, and there is a risk that it will approach considerably from western Japan to the Pacific side of eastern Japan on the 3rd.



The rainy season was announced in southern Kyushu on the 1st, and in Shikoku on the 2nd today.
*There is a period of "transition" of about 5 days on average between the start and end of the rainy season, and the dates may be revised at a later date.

There is a possibility of heavy rain early in the rainy season. Be wary of flooding of low-lying land, rising river water, landslides, etc.

The typhoon is expected to move east of Japan on the morning of the 4th and turn into an extratropical cyclone. After the typhoon passes, the front is expected to move eastward from the west and become stationary south of Honshu. As a result of this, damp air tends to flow in, and the weather is likely to continue to be cloudy and cloudy.





June is here, and it looks like the full-fledged rainy season will begin. Please check the disaster risk in your area on a daily basis using hazard maps and take measures against heavy rain, such as checking your disaster prevention stockpiles.