Tomorrow, the 11th (Saturday), the southern Kanto region is expected to experience summer weather - be careful of spring heatstroke

2026/04/10 13:09

The low pressure system that brought rain across the country today is moving north, and the front is moving away to the east of Japan. The weather will continue to be rough in northern Japan, so please pay attention to the latest information.



The weather will improve from eastern Japan to western Japan,
with clear skies and temperatures rising.
In particular, summer temperatures are predicted to be 27c (similar to late June) in Tokyo and 25c (similar to early May) in Kagoshima.



The body that has just passed winter and just welcomed spring is not yet accustomed to the heat.
Please be careful of ``spring heatstroke'' caused by a sudden rise in temperature at a time when you are not used to sweating.
Take care to prevent heat stroke by choosing cool clothing and being more conscious of hydration than usual.



Symptoms of heatstroke may suddenly worsen.
If someone is feeling unwell and needs a break,
it is strictly prohibited to leave that person alone.

If your symptoms are severe, please consult a medical institution appropriately.

Weather changes every few days. Cherry blossoms bloom warmer than normal and are in full bloom, while precipitation exceeds normal from western Japan to Tohoku (weather summary from March 29, 2026 to April 4, 2026)

2026/04/10 07:03

This is a summary of the weather for this period (March 29th to April 4th, 2026).

#Summary of the weather for this period (March 29th to April 4th)
During this period, the weather across the country changed every few days, and warm air from the south easily entered areas around Honshu, with some locations recording summer days with temperatures of 25c or higher during the period. As a result, the average temperature was significantly higher than normal across the country, with many locations experiencing a markedly high temperature trend of more than 3 to 4 degrees Celsius.

Precipitation tended to be above normal in a wide area around Honshu, as it was susceptible to the effects of low pressure systems and fronts. Total precipitation was more than 2 to 3 times normal in a wide area from western to eastern Japan, and in Kochi in particular, due to heavy rain on the 4th, the total precipitation was more than 8 times greater than normal.

Sunshine hours tended to be below normal, with many cloudy and rainy days across the country due to the effects of low pressure and fronts. However, in Hokkaido, the influence of low pressure and fronts was relatively small in places such as Sapporo and Asahikawa, and in some places, sunshine hours were slightly above normal.



[About this period's weather]
#Characteristics of pressure distribution
On the 29th, the center of a mobile high pressure system moved over the Sea of Japan. In the East China Sea, a low pressure front is slowly moving east-northeast. On the 30th, the high pressure system gradually moved away to the east of Japan, and a front remained stationary from the Nansei Islands to the central region. A new low pressure system formed above the front and moved eastward as it developed, moving east-northeast across the Sea of Japan on the 31st. The center of the low pressure system passed through the Tohoku area and reached the Sanriku coast by late night on the 31st, and moved away to the east of Japan on the 1st. A front stretched from east of Japan to near Taiwan, and in the East China Sea, a kink on the front became a new low pressure system that moved eastward and near the southern coast of Honshu. On the 2nd, the low pressure front developed and moved along the Tokai and Kanto coasts, then northeast toward the Sanriku coast. Meanwhile, a new migratory anticyclone moved eastward from the East China Sea, and on the 3rd, a large area around Honshu became an anticyclone. Behind the anticyclone, two low pressure systems accompanied by fronts moved through northeastern China and central China, and by the 4th, the two low pressure systems and their associated fronts approached the vicinity of Honshu.

#Precipitation
On the 29th, the rain intensified near the Sakishima Islands, where the front was stationary, and extremely heavy rain of 66.5 mm/h was observed in Nakasuji, Tarama Village, Okinawa Prefecture. On the 30th, heavy rain of 49.5 mm/h was observed in Kimotsuki Maeda, Kagoshima Prefecture, in western Japan due to the rain clouds that had developed due to a front near the East China Sea. On the 31st, it rained widely due to the influence of a low-pressure front moving over the Sea of Japan. The weather became stormy with stronger winds, and in Shizuoka Prefecture, heavy rain caused landslide warnings to be announced in Omaezaki City and other areas. On the 1st, due to the effects of a low-pressure front, it rained widely in western Japan and eastern Japan on the Pacific side, with heavy rain falling in some places in Kagoshima Prefecture. On the 2nd, a low pressure system moving off the coast of Sanriku caused snow and rain on the Pacific side of Hokkaido. Snowfall of 23cm/3h was observed in Shibecha-cho, Kushiro region, a record heavy snowfall for April. On the 3rd, atmospheric conditions became unstable in the Tohoku region, with localized rain. Somewhat heavy rain was observed in the Sakishima Islands due to the influence of the front. On the 4th, extremely developed rain clouds associated with a low-pressure system caused heavy rain in Shikoku, with heavy rain of 85 mm/h observed in Kochi City and 98 mm/h in Shigefuji, Kami City, Kochi Prefecture.

#Temperature
On the 29th, a high pressure system covered the area, making it warmer than normal in many places. Full bloom chart for cherry blossoms in Tokushima. On the 30th, warm air flowing around the edge of the high pressure system caused temperatures to rise on the Sea of Japan side due to the Foehn phenomenon, and a summer day of 25.0 C was observed in Fukui. On the 31st, a temperature of 29.3 degrees Celsius, on the verge of midsummer day, was observed in Mima Shianabuki, Tokushima Prefecture, where the southerly wind became a current over the mountains. Highest temperatures were recorded at 23 locations, mainly in western Japan, breaking the highest temperature set in March. On the 1st, warm air flowed over Okinawa, and Hateruma experienced a midsummer day of 30.5 degrees Celsius, the first in the country. Full bloom chart for cherry blossoms in Maebashi and Yokohama. On the 2nd, temperatures rose in western and eastern Japan as the weather improved. In Miyazaki, the temperature rose to 22.8 degrees Celsius, but in northern Japan, the temperature has dropped due to snow, rain, and cold air. On the 3rd, a high pressure system covered a wide area and temperatures were on par with late April to May. Full bloom chart of cherry blossoms at 12 locations including Kanazawa and Osaka. On the 4th, temperatures rose in various places due to the influence of warm air heading towards a low pressure system. There were many places with temperatures above 20 degrees Celsius, mainly in western Japan, where southerly winds became a phenomenon.

[Typhoon information] Typhoon No. 4 occurs near Truk Islands

2026/04/10 06:41

At around 3 a.m. on the 10th (Friday), a tropical cyclone that was developing near the Truk Islands became Typhoon No. 4.

#Typhoon No. 4 10th (Friday) 3:00 a.m.
==================
Center location: Near Truk Islands
Traveling speed: West 20km/h
Central pressure 996hPa
Maximum wind speed 18m/s (near the center)
Maximum instantaneous wind speed 25m/s
=================



Typhoon No. 4 is expected to continue to develop and move northwestward, and is expected to become extremely strong by the 12th. It is expected to approach the Mariana Islands around the 14th, at which point the central pressure will be 920 hPa, the maximum wind speed near the center will be 50 m/s, and the maximum instantaneous wind speed will be 70 m/s.

From next week onwards, the typhoon may gradually move northward into the southern seas of Japan and have an impact, so please pay attention to the updated typhoon information.

Latest 1-month forecast: Western and eastern Japan's Pacific side has many cloudy and rainy days, with high temperatures nationwide around Golden Week

2026/04/09 20:45

On the 9th (Thursday), the Japan Meteorological Agency announced the latest one-month forecast, which shows the weather outlook for the next month.



The forecast for the average sea level pressure for one month shows that the sea level pressure near the southern coast of Honshu will be relatively low, resulting in a weak pressure trough. For this reason, western Japan and the Pacific side of eastern Japan seem to be more susceptible to the effects of low pressure systems and fronts. The area around Okinawa and Amami will likely be covered by high pressure.
The temperature distribution at approximately 1,500 meters above the ground is expected to be warmer air that will cover a wide area around Honshu, and temperatures will likely be higher than normal nationwide.



The weather from northern Japan to the Hokuriku region will change every few days, and the amount of precipitation will be around normal. Okinawa/Amami is easily covered by high pressure, so precipitation is likely to be lower than normal.

On the other hand, western and eastern Japan is susceptible to the effects of low pressure systems and fronts, so there will be many cloudy and rainy days, and precipitation will be higher than normal, especially on the Pacific side. There is a possibility of rain during the Golden Week period in May, and depending on the trends of low pressure systems and fronts, the weather could become rough. Please be sure to check the latest weather information when planning your plans during the holidays.



From now on, temperatures will be higher than normal nationwide, and there will be many summer days with temperatures above 25c. Depending on the weather conditions, there may be some places inland that experience midsummer days with temperatures above 30 degrees Celsius.
In particular, the Japan Meteorological Agency has released early weather information regarding high temperatures, predicting that temperatures from around April 15th are expected to be ``significantly higher'' than normal in Hokuriku, Tokai, Kyushu, Okinawa, and Amami.
Although the full-scale arrival of summer is still a long way off, it is important to take precautions to avoid heatstroke by drinking water and taking frequent breaks when participating in outdoor activities.

Sea surface temperatures around Japan are higher than normal Ocean summary (March 29, 2026 - April 4, 2026)

2026/04/09 18:38

Sea surface temperatures around Japan continue to remain high.
Sea surface temperatures in the waters of Japan were up to 4c higher than normal in the northern and central regions, and up to 5c higher than normal on the western continental side.
Marine summary from March 29, 2026 to April 4, 2026.



#Pressure distribution and waves
On March 29-30, a front extended from South China to the East China Sea, and a low pressure system moved eastward above the front. Waves gradually increased in the waters near the Nansei Islands.
From April 31st to April 1st, a low-pressure system in the Sea of Japan, accompanied by a front, passed near Honshu and moved eastward to Japan.
From the 1st to the 3rd, a low-pressure system developed on a front in the East China Sea and moved east-northeast along the southern coast of Honshu, then northeast east of Japan.
From the 31st to April 3rd, the storm spread from the south of Japan to the east of Japan. On the 1st and 3rd, there was a big storm in eastern Japan.
On the 4th, a low pressure system accompanied by a front moved from the Yellow Sea, passed near the Tsushima Strait, and headed toward the Sea of Japan. Waves increased in the Tsushima Strait, the East China Sea, and the waters near the Nansei Islands.



#Sea surface temperature
Sea surface temperatures in the Japanese sea area were higher than normal by up to 4 C above normal in the northern and central regions, and up to 5 C above normal on the western continental side.
In the East China Sea, sea levels continued to be higher than normal.
The sea area near the Nansei Islands has expanded slightly higher than normal.
South of Japan, areas of higher-than-normal waters have expanded.
To the east of the Kanto region, the area of higher-than-normal waters has shrunk. It was up to 3 degrees higher. Off the coast of Sanriku, the sea area continued to be lower than normal, with temperatures as low as 3 degrees Celsius.
The sea area around Hokkaido was normal, and the sea ice area in the Sea of Okhotsk has shrunk.

Tonight and tomorrow another "spring storm", 11th (Saturday) Tokyo is expected to be 27 degrees Celsius and a summer day (commentary: weather forecaster Atsuko Miyake)

2026/04/09 13:42

From tonight to tomorrow, the 10th (Friday), the rain and wind will become stronger again, making it likely to become a ``spring storm.''



First, let's take a look at the state of the clouds at this time.
There are still many sunny areas in eastern and northern Japan within the area of high pressure.
Meanwhile, a large mass of clouds is approaching from the continent.

Clouds associated with low pressure systems and fronts.
Clouds are spreading in western Japan, and it is starting to rain in some places.



Let's take a look at tonight's forecast weather map and the forecast weather map for tomorrow and the day after.
A low pressure system and front will be approaching from the west tonight.
The low pressure system near the Yellow Sea is expected to move towards the Sea of Japan by tomorrow,
and is expected to continue moving northeast as it develops.

It is expected to advance further into northern Hokkaido and develop further into the 11th (Saturday).
Western and eastern Japan will experience very unstable atmospheric conditions into Friday as warm, humid air moves toward a low-pressure front.
In northern Japan, the weather is expected to be rough as a
low pressure system approaches and develops over Saturday and Sunday.

It looks like there will be a "spring storm" over a wide area from now on through the weekend.



Rain is forecast.
After this, I will try running it in the evening.
Western Japan is expected to experience widespread rain.
Rain clouds are expected to cover the Kanto region late at night.

By the time the date changes, you will see red and yellow displays in the Chugoku and Kyushu regions.
It is expected to rain heavily and in some places it will be very heavy and the rain will be heavy.
Also, rain peaks during the dark hours of the night.
If you are in western Japan, please be careful about how it rains.



Tomorrow morning, red signs will appear in the Kanto and Tokai regions.

Heavy rain and thunderstorms are expected on the Pacific side of western and eastern Japan.
Please be careful of sudden heavy rain, lightning strikes, and gusts of wind.
After tomorrow evening,
the area of rain will gradually narrow from the west.
The rain is expected to stop in the Kanto region at night.



However, the windy conditions are likely to continue.
As the low-pressure system approaches, there is a possibility that a storm warning will be issued in
northern Kyushu from tonight to tomorrow.
In addition, due to the influence of a developing and approaching low pressure system, there is a risk of strong winds in Hokkaido, mainly on Saturday and Sunday.
Over this weekend, there will be strong rain and winds that will affect transportation in various places.

Please pay close attention to the latest traffic information.
lets you see detailed weather information for each location.



Tomorrow, there will be heavy rain with thunder or very heavy rain in some places until morning in western Japan and until evening in eastern Japan.

Be careful and be on guard against heavy rain and strong winds.
It is expected to start raining in northern Japan from around noon.
The wind is getting stronger and it looks like it's going to rain sideways.



Finally, the weekly forecast.
The weather will improve on Saturday the 11th.
It will be sunny in many places from Okinawa to Tohoku.
And the temperature will be higher.
It may be the first summer day of the year in Tokyo at 27 degrees.

Next week, there will be more rain in many places.
The low pressure system is likely to cause rain in many places, especially in western and eastern Japan, where the front approaches.

The weather is going downhill from the west, with rain and wind expected to increase over a wide area tomorrow

2026/04/09 12:16

The high pressure system that brought calm and sunny skies yesterday is moving away to the east of Japan.
Meanwhile, a low pressure system accompanied by a front is located near China and is moving east-northeast.
A warm front extending from this low pressure system is expected to reach the Kyushu region by night.
Warm and humid air will flow into the front from the south, causing unstable atmospheric conditions.



For this reason, the weather is gradually descending from the west, and there are places from the Chugoku region to Kyushu where it has already begun to rain.
The area of rain will gradually spread to the east, and there is a possibility that it will start raining in the evening in some parts of the Kanto region.



The low pressure system will continue to develop over the 10th as it moves towards the Sea of Japan, and the front is expected to pass near Honshu.
Atmospheric conditions will be extremely unstable mainly in western Japan from the night of the 9th to the 10th as warm, humid air flows towards fronts and low pressure systems.
Also, there is a risk that the gradient of atmospheric pressure will increase with the high pressure system to the east of Japan, and the winds will become stronger.



From the night of the 9th to the 10th, western Japan should be careful of lightning, tornadoes, severe gusts, and sudden heavy rain.
If there are signs that a developed cumulonimbus cloud is approaching, please take precautions such as moving inside a building.

Northern Japan is as cheerful as May, with temperatures expected to be similar to late June in Tokyo over the weekend.

2026/04/09 07:06

Today, the 9th (Thursday), a high pressure system will cover northern Japan and the Kanto region, and sunshine is expected to reach the area during the day. As warm air flows in from the south, temperatures are expected to rise, with many places in northern Japan reaching a maximum of over 15 degrees Celsius, and many places expected to experience temperatures similar to early to mid-May. The temperature difference between morning and evening and during the day will be large, so please be careful of the temperature difference.
The Kanto region also has many sunny spells during the day, and it will be warm, typical of this time of year.
Western Japan will have a cloud-dominated sky, but the temperature will be around 20c in many places, and it is likely to be as warm as normal in many places.

The predicted maximum temperature is Sapporo 17c, Sendai 19c, Tokyo 20c, Nagoya 21c, Kanazawa 22c, Osaka 21c, Kochi 20c, Fukuoka 20c.



This weekend, from the 11th (Saturday) to the 12th (Sunday), the temperature is expected to reach +12c at an altitude of around 1500m, which is warm for this time of year and is expected to flow into the vicinity of Japan. As the area around Japan is covered by high pressure, the weather will improve in many places, and it is likely to be unseasonably hot in many places this weekend.

On Saturday the 11th, temperatures are expected to exceed 20c from western Japan to eastern Japan and the southern part of Tohoku. In central Tokyo, the expected maximum temperature is 27c, which is similar to late June. This is the time when people are not used to the heat yet, so those who exercise should be careful to avoid heat stroke by drinking plenty of water.
The warm weather will remain on the 12th (Sunday), with temperatures expected to be similar to those from May to early June, mainly in northern and eastern Japan. It is expected that it will be summer in Nagoya and Osaka as well.
Then, from around the 13th (Monday), a low pressure system will approach from the west, resulting in cloudy and rainy weather, and temperatures are expected to settle down to normal levels.

Today's 9th (Thursday) weather The weather is going downhill from the west, sunny in northern Japan

2026/04/09 06:30

Today, the 9th (Thursday), the high pressure system that brought sunny skies yesterday (8th) will move away to the east of Japan, and low pressure systems and fronts will move eastward from the west. In northern Japan, which is covered by high pressure, many places will be sunny, but in western and eastern Japan, the weather will go downhill.



Northern Japan will be covered in high pressure and will have sunny skies in many places. Although there will be times when clouds will spread out, the weather does not seem to deteriorate. However, please be careful of strong winds in Hokkaido, as the winds are stronger mainly in the coastal areas.

On the other hand, the weather in western and eastern Japan is gradually going downhill.
In Kyushu, it is expected to start raining around noon, with heavy rain expected at night. Be careful of lightning strikes, gusts of wind, and sudden heavy rain.
The rain is expected to spread over Chugoku and Shikoku in the evening, and from the Kinki region to the Tokai region and Hokuriku region by late evening. It looks like there will be places in the Kanto region where it will start to rain late at night. It is expected that it will be sunny in many places, especially in eastern Japan, during the day, but please prepare rain gear for the time you return.

Okinawa will be sunny and the sun will shine.

Weekly weather Low pressure and fronts pass periodically; weather will deteriorate over a wide area on the 10th (Friday)

2026/04/07 19:42

Today, the 7th (Tuesday), low pressure systems moved east-northeast around Hokkaido and the southern coast of Honshu, bringing rain to many places across the country. In northern Japan and the Hokuriku region, there are places where snow is falling, mainly along the mountains, due to the influence of cold air in the sky.

After this, a high pressure system will emerge from the west and is expected to cover the Honshu region by tomorrow, the 8th (Wednesday). The weather will improve in many places, and it will be sunny in many places. However, please be aware that near northern Japan, there is a large gradient in atmospheric pressure between the high pressure overhanging from Honshu and the low pressure near the Sea of Okhotsk, and winds are expected to increase.



Over the next week, low pressure systems and fronts will periodically pass near Japan, and there will be days when the weather will deteriorate.

On the 9th (Thursday), a low pressure system with a front will move eastward from near the Yellow Sea. It will start raining in the afternoon in western Japan.

On the 10th (Friday), a low pressure system will move toward the Sea of Japan and continue to develop as it moves northeast. Rain will fall over a wide area near Japan as the front passes. Please be careful as the rain may become heavier temporarily. It is also possible that low pressure and winds blowing toward the front will cause torrential rain. Please check the latest information and be careful when going out.

On Saturday the 11th, the weather will improve in western and eastern Japan, but there will still be some rain in northern Japan and the Hokuriku region. In addition, strong winds will continue in the Hokkaido region, which is close to a low pressure system.

12th (Sunday) The area around Honshu will be covered in high pressure and it will be sunny in many places, but a front is expected to extend from the continent to the south of Kyushu. There will be some places in the Kyushu region where it will rain.

From Monday 13th to Tuesday 14th, a front will extend from the continent to the southern coast of Honshu, and a low pressure system will form above the front, which is expected to move eastward. Rain is expected to gradually spread from western Japan to northern Japan.




Temperatures are expected to be around average or high in many places throughout the period.
In particular, on the 9th (Thursday), the temperature will be 21c in Sendai, the same as late May, 18c in Sapporo, 22c in Kanazawa, and 27c in Naha, the same as mid-May.
On the 11th (Saturday), the temperature in Tokyo will be 26c, which is similar to mid-June, and it will be a cheerful weather ahead of the season.
This is the time when you are not used to the heat yet, so please take precautions against heatstroke by taking frequent breaks and hydrating.