Tomorrow will be a day when you won't be able to do without your umbrella, as there is a risk of heavy rain on the Pacific side.

2026/04/22 14:30

The sun is shining in many parts of eastern and western Japan today, and this is likely to be a rare sunny day.
Tomorrow, the rain area is expected to spread from west to east, and the rain will be concentrated over a wide area of the Japanese archipelago.

A low-pressure system with a front near China is slowly moving eastward, affecting Kyushu, Shikoku, and Honshu from tonight until tomorrow. Rain has already begun in parts of Kyushu, and is expected to gradually spread eastward.



What you should pay particular attention to is the way the rain falls, mainly on the Pacific side. As warm, humid air flows toward the low pressure system and front, locally heavy rain is possible.



In some areas, the peak of rain coincides with the time of commuting to work and school, so it is necessary to be careful about the impact on transportation and flooding of roads. Please be sure to bring an umbrella and protect your feet from getting wet when you go out.

High temperatures trend nationwide; the cherry blossom front heads towards Hokkaido; Typhoon No. 4 temporarily develops into a large and ferocious force (weather summary March 29, 2026 - April 4, 2026)

2026/04/22 07:03

This is a summary of the weather for this period (April 12th to April 18th, 2026).

#Summary of the weather for this period (April 12th to April 18th)
The average temperature was well above normal in many locations as the country was easily covered by warm air. During the period, there were many locations where summer days of 25 C or higher were observed, and the temperature remained on par with that from May to June.

Precipitation tended to be below normal in northern Japan, eastern Japan, and Okinawa/Amami, which were easily covered by high pressure. On the other hand, western Japan was susceptible to the effects of fronts and low-pressure systems, so temperatures were slightly above normal, especially in Kyushu.

Sunshine hours were below normal in western Japan, where there were many cloudy and rainy days due to low pressure and fronts, and in some places in Kyushu, such as Fukuoka, it was well below normal. Northern Japan, eastern Japan, Okinawa and Amami tended to have higher than normal temperatures due to the influence of high pressure, and the Sakishima Islands experienced significantly higher than normal temperatures.



[About this period's weather]

#Characteristics of pressure distribution
On the 12th, a low pressure system moved northeast over the Sea of Okhotsk. East and west Japan were covered in high pressure. On the 13th, Typhoon No. 4 became a large and intense force with a central pressure of 905 hPa, moving westward through the Mariana Islands. Near Honshu, a front has stalled from south China to the East China Sea and south of Honshu. On the 14th, northern and eastern Japan was covered in a belt-shaped high pressure system. The front continued to stagnate from the western East China Sea to the south of Honshu, and a low pressure system formed in the East China Sea above the front. On the 15th, the low pressure front moved east-northeast over the sea south of Honshu. On the 16th, it continued to develop as it passed through the Izu Islands and gradually passed into the sea east of Japan. Typhoon No. 4 gradually changed its course to the east and headed north. On the 17th, the area around Honshu was covered by a mobile anticyclone. A new low pressure system has formed in the East China Sea and is moving north. On the 18th, the mobile high pressure system moved away to the east of Japan, and the continental low pressure system approached northern Japan. The low pressure near the East China Sea was almost stationary, and Typhoon No. 4 moved northward over the ocean east of the Ogasawara Islands.

#Precipitation
On the 12th, rain and snow occurred in parts of Hokkaido and northern Tohoku, mainly on the Sea of Japan side. Rain in the Nansei Islands due to the front. On the 13th, Hokkaido experienced localized rain and snow during the day. In Okinawa and Amami, the area of rain expanded due to the influence of the front, and heavy rain was observed on Suwanose Island with an hourly rainfall of 36.5 mm. On the 14th, rain spread across western Japan, including Kyushu, the Chugoku and Shikoku regions, due to the influence of a front and low pressure. On the 15th, it continued to rain in western Japan due to the influence of a low pressure system moving above the front. The area of rain gradually expanded to eastern Japan. On the 16th, due to the effects of a low-pressure system, rain fell mainly from the Tohoku Pacific side to the Kanto coast. In the Sakishima Islands, the rain intensified due to the influence of the front, and heavy rain with 38.0 mm of precipitation per hour occurred on Shimojijima, Miyakojima City. On the 17th, a large area around Honshu was in a high-pressure area, and there was almost no noticeable precipitation, but on the 18th it rained in western Japan, mainly in Kyushu, due to the influence of a low-pressure system stationary in the East China Sea. Rain clouds developed over the Sakishima Islands due to the influence of humid air, and heavy rain was observed on Yonaguni Island on the morning of the 18th, with an hourly rainfall of 96.0 mm.

#Temperature
On the 12th, temperatures from eastern Japan to Okinawa were higher than normal, but temperatures in northern Japan were temporarily lower than normal. On the 13th, early summer air blanketed the skies over Tohoku and western Japan, and summer days were observed at more than 50 locations near Honshu, including Fukushima (26.8c) and Kumagaya (26.4c). On the 14th, temperatures rose from the Kanto region to the Kinki region, with Osaka recording a summer day of 25.6 C. On the other hand, in Kyushu, where it rained, the temperature was lower than average. On the 15th, there was rain in many places, but the temperature did not drop much, and many observation points in Akita and Niigata prefectures recorded the highest temperature of the year (as of April 15th). On the 16th, the weather improved over a wide area, with warm air covering western and eastern Japan. In Nagoya, the temperature was 26.6c, the first summer day of the year. On the 17th, many places were covered in high pressure and sunny, but the morning turned cold due to radiation cooling, resulting in a day with large temperature differences. On the 18th, temperatures rose nationwide due to warm air from the south. In Hokkaido, the blooming of cherry blossoms has been announced in Hakodate, Sapporo, and Obihiro. In Sapporo, the temperature rose to 20.0c, which is comparable to the warmth of late May.

3-month forecast: It's getting hotter nationwide, beware of heatstroke; be careful of heavy rain during the rainy season

2026/04/21 20:04

On the 21st (Tuesday), the Japan Meteorological Agency announced the latest three-month forecast, which shows the weather outlook for the next three months.



There is a high possibility that an El Nino phenomenon will occur in the future. Sea surface temperatures will be higher in the eastern to central equatorial Pacific Ocean, westerly monsoon winds will be strong, and cumulonimbus clouds will be more likely to form from east of the Philippines to the central Pacific, and less likely near Indonesia.
As a result of these effects, the Pacific anticyclone is expected to extend further northward. Although the continental Tibetan high pressure system has a weak extension to the north, its extension toward Japan is expected to be about the same as in normal years.
For these reasons, upper-level westerly winds are expected to flow more northward than normal from near Japan to the sea east of Japan.



Based on the above, it is expected that the country will be likely to be covered in warm air for the next three months. Average temperatures for the next three months are expected to be higher than normal across the country, and temperatures will rise at a faster pace. When the temperature is high, there will be midsummer days with temperatures over 30 degrees Celsius, and depending on the location and weather conditions, there will be places where it can be extremely hot days with temperatures over 35 degrees Celsius. To avoid heatstroke, please take care of your health by drinking plenty of water and taking adequate breaks.



Precipitation for the next three months is expected to be at normal levels nationwide. Heavy rain is especially likely to occur from June to July when the rainy season front becomes active. Please be prepared for heavy rain disasters and frequently check the latest weather information.

Be wary of temperature changes this week; the second half of the week will be chilly.

2026/04/21 12:02

From the 23rd (Thursday) to the 24th (Friday), a
low pressure system is expected to pass near the southern coast of Japan, and heavy rain is expected to fall over a wide area on the Pacific side.
It seems like spring, and the weather continues to change periodically. When going out, it is a good idea to check the latest weather information.



Also, you need to pay attention not only to the weather but also to changes in temperature. Temperatures will rise today and tomorrow, mainly on the Pacific side, but temperatures will return to normal on Thursday and Friday, and it may feel chilly if you wear light clothing. Please be careful when choosing your clothes so as not to get sick.

Widespread rain is expected from the 23rd (Thursday) to the 24th (Friday) of this week. A low pressure system and front will pass over the southern coast of Honshu.

2026/04/21 07:37

Later this week, around the 23rd (Thursday) and 24th (Friday), a low pressure system accompanied by a front is expected to move eastward along the southern coast of Honshu. Rain is expected to fall over a wide area from western Japan to northern Japan.



Rain is expected to start in Kyushu from the night of the 22nd (Wednesday). After that, the area of rain is expected to gradually expand to the east until the 23rd (Thursday). Rain will cover a wide area of western Japan in the morning, and will spread to eastern Japan in the afternoon.





On Friday the 24th, it will rain in the morning in eastern and northern Japan, and the weather will gradually improve.

Rain clouds may develop on the Pacific side near low pressure systems and fronts, and the rain may temporarily intensify. Winds will also become stronger, especially in coastal areas. Please carry a sturdy umbrella and be careful when going out.
There is a risk of heavy rain, especially on the Pacific side of western Japan. Please check the latest information.

Weather for today, the 21st (Tuesday): A front passes. Be careful of thunderstorms in northern Japan and Hokuriku.

2026/04/21 06:19

Today, the 21st (Tuesday), a developing low pressure system is expected to move northeast across the northern Sea of Japan, and a cold front is expected to pass through northern Japan in the morning.



It will rain until the morning in northern Japan and Hokuriku, and there is a risk that the rainfall will become heavier with localized thunder. Please be careful of lightning, gusts of wind, and hail.
Although the weather will improve in many places in the afternoon, the atmosphere will remain unstable. Please be aware of changes in the sky in northern Japan.
Also, on the Pacific side of Tohoku, westerly winds are stronger, so caution and vigilance should be taken to avoid traffic disruptions and damage to buildings due to strong winds.

There is also a possibility of showers in the Kanto, Tokai, and Kinki regions by morning, but the weather will improve in many places during the day.
Temperatures are rising mainly on the Pacific side, and Shizuoka is expected to experience a midsummer day in Tokyo, with an expected maximum temperature of 30 degrees Celsius. If you are active outdoors, please be careful of heat stroke.

Western Japan will be sunny and the sun will shine. Although the temperature will be lower than the day before, it is expected to be high in many places for this time of year. It seems to be relatively comfortable during the day.

There is also a risk of yellow sand flying over a wide area of northern and western Japan until tomorrow, the 22nd (Wednesday). Outdoors is expected to have negative effects such as yellow dust adhering to laundry. Please be aware that if the visibility is less than 5 kilometers, there is a risk of disruption to traffic.

[Latest yellow dust forecast] A large amount of yellow dust in mainland China will spread widely from tomorrow to the west and northern Japan

2026/04/20 11:44

A large amount of yellow sand is being blown up around the Gobi Desert, and today, the 20th (Monday), visibility is observed to be less than 5 km in some places, mainly in northeastern China.
Please be careful as there is a possibility that it will fly over Japan tomorrow, the 21st (Tuesday).

Today, the 20th (Monday), a low pressure system accompanied by a front is moving northeast over northeastern China.
Kosa is distributed along the west side of this cold front.



From now on, as the cold front advances eastward, the yellow dust will spread eastward.
Also, a low pressure system has formed in the Sea of Japan and is expected to move northeast along the coast of mainland China until tomorrow, the 21st (Tuesday).
The front extending from this low pressure system will pass through eastern and northern Japan in the morning of tomorrow, the 21st (Tuesday).



After the front passes, yellow dust is expected to cover a wide area of western and northern Japan from tomorrow the 21st (Tuesday) to the 22nd (Wednesday), and visibility is expected to be less than 10 km.

As early as possible, it is expected to arrive in northern Kyushu from the early hours of the 21st (Tuesday), and in southern Kyushu, Chugoku, and northern Kinki as early as the 21st (Tuesday) morning.



There are expected to be impacts depending on the area, such as dirty cars and laundry.
Please be aware that if visibility is less than 5 km, there is a risk of traffic problems.
If you have hay fever or respiratory illnesses, your symptoms may worsen, so please take all possible precautions.

The most common yellow sand is observed in spring (March to May).



This is because there is nothing to cover the ground in spring, making it easy for dust to fly around.
In summer and autumn, the ground is covered by plants, and in winter, it is covered by snow and ice, which suppresses the occurrence of yellow sand.
However, last year, there was little rain in the area where it occurs and dry conditions continued, so strong winds from low pressure systems tend to blow up yellow sand, making it easy for yellow sand to fly in the air even in autumn.

A cold front will pass from the night of the 20th (Monday) to the 21st (Tuesday), leading to widespread rain.

2026/04/19 12:09

A low pressure system accompanied by a front is expected to pass near Hokkaido from the night of the 20th (Monday) at the beginning of the week until the 21st (Tuesday). A cold front extending from the low pressure system is expected to pass from northern Japan to western Japan, causing rain to fall over a wide area.



Rain will begin to fall in the Chugoku region and northern Kinki region from the night of tomorrow, the 20th (Monday). The cold front is expected to move eastward over Hokkaido and Honshu, gradually increasing the area of rain.



Rain is expected to fall over a wide area from Hokkaido to the Kinki region on the morning of the 21st (Tuesday). There may be places where you will need an umbrella during commuting hours. In addition, when a cold front passes, the rain will temporarily increase in strength, and there will be places where it will be accompanied by thunder. You need to be careful about how it rains.



In Hokkaido, rain is expected to remain in some places until the afternoon of Tuesday the 21st, but in other areas, the weather is expected to improve as high pressure gradually approaches from the west.

With the passage of a low pressure system or front, atmospheric conditions are expected to become unstable in some places due to the effects of warm, humid air in the lower layers and cold air in the upper layers heading towards the low pressure system. Please be careful of lightning, gusts of wind, hail, and sudden heavy rain due to the development of rain clouds.
In addition, the gradient in atmospheric pressure is expected to increase between this low pressure system and the high pressure system moving near the Kuril Islands and the Yellow Sea, leading to stronger winds, mainly in northern Japan. Please be careful when going out.

Weekly weather: Low pressure and fronts often pass near Honshu. Be careful of yellow sand after the rain

2026/04/19 07:26

From now on, it will rain widely along the Sea of Japan from the 20th to the 21st, and the weather is likely to deteriorate across the country from the 23rd to the 24th.

Tomorrow, the 20th (Monday), it will rain mainly in the morning in Kyushu, and it is likely to rain in places in Shikoku from the afternoon onwards. From western Japan to eastern Japan, the sky will be more cloudy as it approaches the Pacific Ocean.
The Sea of Japan side is expected to be gradually affected by the front. From the night of the 20th to the morning of the 21st (Tuesday), there will be rain from northern Japan to Hokuriku, and there will be localized areas where the rain will become heavier with thunderstorms. Please be careful of lightning strikes, tornadoes, and other strong wind gusts.



On the 21st (Tuesday), high pressure will prevail after the front passes, and the weather will improve in many places on the Japan Sea side. However, there is a possibility that yellow dust may come from the continent, so even if the weather improves, we must not let our guard down. Please be careful of poor visibility and dirt on your car.

On the 22nd (Wednesday), high pressure is dominant and it is expected to be sunny in many places. On the other hand, a new low pressure system and front is expected to approach from the west. Therefore, from the 23rd to the 24th, it will rain over a wide area around Honshu, and the weather will be unstable. In western Japan and the Pacific side of eastern Japan, where warm, humid air tends to flow in, the atmospheric conditions will be unstable and there will be heavy rain showers accompanied by thunder. Winds are also expected to become stronger, especially in coastal areas. Please pay attention to the latest weather information that will be updated in the future.

From now on, there will be many days with higher temperatures than normal, and in many places it will be hot and sweaty, with temperatures reaching 25c or higher, similar to May. If you're going to spend time outdoors, it's a good idea to stay hydrated frequently and take precautions against UV rays as much as possible.

The front of cherry blossom blooming goes to Hokkaido; cherry blossom blooming announced in Hakodate, Sapporo, and Obihiro

2026/04/18 20:02

Today, Saturday, the 18th, it was announced that cherry blossoms will bloom in Hakodate, Sapporo, and Obihiro. The cherry blossom front has finally reached Hokkaido.

All locations bloomed more than 10 days earlier than normal, making this the second earliest bloom in Sapporo since statistics began in 1953. Also, on the same day in Sapporo, it was announced that the Chinese cabbage was blooming.

#Seasonal news (cherry blossoms, white plum blossoms)
Obihiro Ezo Yamazakura blooming 14 days earlier than normal and 10 days earlier than last year
Hakodate Someiyoshino cherry blossoms 10 days earlier than normal and 5 days earlier than last year
Sapporo Someiyoshino blooming Taira 13 days earlier than usual and 5 days earlier than last year
Sapporo Hakubai blooming 11 days earlier than normal and 5 days earlier than last year

In Hokkaido, cherry blossoms are blooming much earlier than usual, and in the northern Tohoku region, cherry blossoms are now in full bloom. In Hokkaido, the flowers are expected to bloom in eastern and northern Hokkaido from late April to early May. It's best to make your cherry blossom viewing plans early.



It looks like there will be some cold mornings in Hokkaido on the 19th, but it will be stable and sunny during the day, with temperatures likely to exceed 15c in many places. In places where the cherry blossoms have bloomed, it will be a good day for cherry blossom viewing. The temperature difference between morning and afternoon tends to be large, so please dress accordingly.