Temperatures tend to be much higher than normal in northern Japan.In eastern and western Japan, areas closer to the Pacific Ocean tend to have less rainfall (weather summary from November 23, 2025 to November 29, 2025)

2025/12/05 06:38

This is a summary of the weather for this period (November 23, 2025 to November 29, 2025).

# Weather summary for this period (November 23rd to November 29th)
The average temperature was above normal in many places because a low pressure system passed near northern Japan and warm air easily entered from the south. In northern Japan, temperatures in places such as Sapporo and Akita were more than 3 C higher than normal, showing a trend that was well above normal.

Precipitation was above normal in some places in northern Japan, such as Kushiro, Abashiri, and Akita, due to the effects of low pressure and fronts. Even in Hokuriku and the San'in area, there were places with higher than normal precipitation due to the effects of low pressure and cold air in the upper atmosphere. On the other hand, as areas from eastern Japan to Okinawa and Amami were easily covered by high pressure, temperatures were well below normal, especially on the Pacific side.

Sunshine hours tended to be above normal because the weather was easily covered by high pressure and there were many sunny days, and there were places on the Japan Sea side of Hokkaido that were well above normal. The Pacific side of Hokkaido and the Tohoku region were susceptible to the effects of low pressure and fronts, so there were places like Kushiro and Akita where temperatures were below normal.



#Characteristics of pressure distribution
On the 23rd, the area around Honshu was widely covered by a belt-shaped high pressure system. On the 24th, a low pressure system moved east-northeast east of Japan, and a front extending from the low pressure system gradually became apparent. Western Japan and eastern Japan continue to be within the area of high pressure. On the 25th, a low pressure system moved eastward through the Sea of Japan. Near the southern coast of Honshu, a new low pressure front has formed and is moving east-northeast as it develops. At 9:00 p.m., Typhoon No. 27 "Koto" occurred in the Sulu Sea in the Philippines. On the 26th, a low pressure system accompanied by a front continued to develop and moved east-northeast across the east of Japan, forming a temporary high-pressure pattern in the east near Honshu. On the 27th, the center of high pressure moved east of Japan.
Multiple low pressure systems and fronts are moving through the Sea of Japan and approaching Honshu from the west. On the 28th, a low pressure system moved eastward near Sakhalin. A new low pressure system formed on the front and passed through Honshu, gradually forming a high pressure system in the west and low pressure in the east. On the 29th, multiple low pressure systems moved north to northeast from the Sea of Okhotsk to the east of Japan. The area around Honshu was gradually covered by high pressure, and the winter-like pressure pattern loosened.

#Precipitation
On the 23rd, there were localized fronts in the Tohoku region and rain in some places in the Nansei Islands due to the influence of moist air moving to the east. On the 24th, rain fell from Tohoku to Hokuriku due to a trough in atmospheric pressure and humid air. Somewhat heavy rain was observed in Sakata City, Yamagata Prefecture, Akita, and other areas. On the 25th, a low-pressure system with cold air in the sky caused rain and thunderstorms, mainly on the Sea of Japan side, with hail and hail falling in some places. In the afternoon, cold rain fell in the Kanto region as well. On the 26th, a temporary winter-like atmospheric pressure pattern resulted in rain and snow on the Sea of Japan coast from northern Japan to Hokuriku. In Harue, Sakai City, Fukui Prefecture, 35.0 mm of precipitation was observed in 3 hours, breaking the record for November. On the 27th, due to the effects of a low pressure system and front approaching from the west, rain spread from western Japan and rained in the Kanto region at night. On the 28th, rain and thunderstorms occurred from northern Japan to Hokuriku, mainly on the Sea of Japan side, due to a front and low pressure system. Rain gradually turned to snow in Hokkaido overnight. In the early hours of the 29th, there was rain and snow in Hokkaido and Hokuriku, but high pressure gradually became dominant, and the area around Honshu became largely sunny during the day.

#Temperature
On the 23rd, as the influence of cold air diminished, temperatures rose from the Tokai to the west, with some places in Kyushu and Shikoku exceeding 20c. Announcement of autumn leaves of Japanese maple in Tokyo. On the 24th, warm air blanketed the country, and temperatures across the country were at or above normal. The highest temperature in Tokyo was 18.8c, about 3c higher than the previous day. On the 25th, cold rain fell in western and eastern Japan, with temperatures in the Kanto and Kinki regions dropping nearly 5 C from the previous day. Yellow leaves of ginkgo trees are announced in Kyoto, Osaka, etc., and autumn leaves of Japanese maple trees are announced in Toyama, Kanazawa, etc. On the 26th, sunshine reached the Kanto region, and the temperature in Tokyo was 18.6c, 6c higher than the previous day. Northern Japan and the Kinki region were affected by cold winds from the north, with the highest temperature in Sapporo reaching 7.1c. On the 27th, temperatures rose due to warm southerly winds heading toward a low pressure system. In Kamioka, Hida, Gifu Prefecture, the temperature was recorded at 17.5c, 7.5c higher than the previous day. On the 28th, daytime temperatures in eastern Japan were around 20c due to warm air. In western Japan, the wind was cold and the temperature rise was slow. On the 29th, the temperature rose to around 20 degrees Celsius in western Japan, but the rise in daytime temperatures was slow in northern Japan and the Kanto region, affected by cold air.

News of the first snow continues to arrive as the coldest air of the season moves south. In Shizuoka, the first snow falls more than 60 days earlier than last year.

2025/12/04 21:05

Near Honshu, a winter-like atmospheric pressure pattern strengthened from yesterday 3rd (Wednesday) to today 4th (Thursday), and the strongest cold air of the season moved south over Honshu. The first snow was observed in various parts of eastern and western Japan from the 3rd to the 4th, and as of 8:00 pm today, the 4th, the number of snowfalls had counted at 19 locations.

Some of the snow clouds also flowed into the Pacific Ocean, and the first snow was observed in Shizuoka, Nagoya, and other areas. With the exception of Niigata, all locations experienced their first snow at least five days earlier than last year, with Nagoya seeing its first snow 31 days earlier and Shizuoka seeing it 64 days earlier.

#3rd (Wednesday) First snow observation point
Nagoya 15 days earlier than normal and 31 days earlier than last year
Toyama Same as normal, 5 days earlier than last year
Gifu 10 days earlier than normal and 11 days earlier than last year
Hiroshima: 5 days earlier than normal, 5 days earlier than last year
Hikone: 7 days earlier than normal, 15 days earlier than last year
Niigata: 10 days later than normal, 15 days later than last year
Matsue: 4 days earlier than normal, 5 days earlier than last year
Kofu 8 days earlier than normal and 11 days earlier than last year
Fukui Same as normal and 5 days earlier than last year
Kanazawa 9 days later than normal and 5 days earlier than last year
Tottori 2 days earlier than normal and 11 days earlier than last year
Okayama 7 days earlier than normal and 14 days earlier than last year
Matsuyama 16 days earlier than normal and 36 days earlier than last year
Shizuoka 34 days earlier than normal and 64 days earlier than last year

#4th (Thursday) First snow observation point *As of 8pm
Shimonoseki 6 days earlier than normal and 18 days earlier than last year
Kyoto 7 days earlier than normal and 15 days earlier than last year
Wakayama Taira 14 days earlier than usual, 24 days earlier than last year
Utsunomiya 12 days earlier than normal, 3 days earlier than last year
Tsu 20 days earlier than normal, 36 days earlier than last year

Trend toward "warm winters and little snow" Be careful of the cold waves from Christmas to New Year! [1 month forecast]

2025/12/04 15:59

Today, December 4th (Thursday), the Japan Meteorological Agency announced the
weather outlook (one month forecast) for December 6th to January 5th, 2026.



#Key points of the 1-month forecast#

[Temperature]
Not susceptible to cold air, high in northern Japan, Okinawa and Amami,
at or above normal in western Japan.

[Snowfall]
The amount of snowfall on the Sea of Japan side of northern and eastern Japan is at or below normal.
On the Sea of Japan side of western Japan, it is less.

[Precipitation]
As it is less affected by cold air and easily covered by high pressure,
the Pacific side of eastern Japan, western Japan, and Okinawa/Amami will be at or below normal levels.

[Sunshine hours]
Most of the sunshine is on the Pacific side of eastern Japan and western Japan, and in Okinawa and Amami it is at or above normal.



Looking at the monthly average sea level pressure (figure on the left) in the forecast results from the numerical forecast model,
the area around Japan is light blue, and
the deviation from the normal year is expected to be small.

The atmospheric pressure is relatively high in the south of Japan, and it is expected that there will be periods when the area from the Pacific side of eastern Japan to Okinawa and Amami is likely to be covered by high pressure.

On the other hand, the temperature at approximately 1,500 meters above the ground (right chart) is shown in orange mainly from
eastern Siberia to central China, and
is expected to be higher than normal.
For this reason, it is expected that the whole country will be less affected by the cold weather.




#In winter with strong temperature differences#

Looking at the weekly temperature forecast,
In the first week, the temperature will be high in northern Japan, western Japan, and Okinawa Amami,
the sun will feel warm during the day,
down coats may be used less than usual.

However, in the second week, temperatures in northern Japan will be at or below normal,
and there may be many days in mid-December when you feel like it's suddenly getting colder.
On the other hand, there is a possibility that conditions such as ``this winter will be warm'' will continue in places such as western Japan.

In the 3rd to 4th week, temperatures are expected to be near normal across the country, so there is a possibility that we will have the usual cold Christmas and New Year holidays.

The experience of winter can change drastically from day to day, so
should be sure to check the weather forecast for temperatures etc. before heading out.

---------------------------------------

In this way, looking at the whole month, the
forecast is for a ``warm winter and little snow,'' but if we take the ``average'' temperature and snowfall for the month,
it's just that the temperature is expected to be higher and there will be less snow than normal,
that doesn't mean it will always be warmer and there will be less snow.

Just like every year, during the period from Christmas to the New Year,
cold waves (strong cold air that flows over a long period of time) strike,
bringing low temperatures and heavy snow.

This winter, there will be days when it will feel warmer than usual,
due to sudden cold waves, and places where there will be heavier snow than usual,
and days where the temperature will be lower.

It is important to check the daily weather forecast frequently rather than just relying on the monthly forecast results.

[Kanto-Koshin] First snow in Utsunomiya. Although the cold air has passed, Nagano Prefecture and the northern Kanto region should be careful of snowfall, frozen roads, and avalanches.

2025/12/04 11:49

The area around Japan had a winter-like atmospheric pressure pattern, with cold air below -30 degrees Celsius flowing into the Kanto-Koshin region at an altitude of approximately 5,500 meters, but the peak of the cold air is passing.
The possibility of warning-level heavy snow has decreased in Nagano Prefecture and the northern Kanto region.
In Nagano Prefecture and the northern Kanto region, it is snowing, and there are some places that have accumulated snow mainly along the mountains and in the mountains.
In Utsunomiya, the first snow was observed today, the 4th (Thursday).
[First Snow] Utsunomiya 12 days earlier than normal and 03 days earlier than last year
The winter-like atmospheric pressure pattern is expected to gradually loosen up until tomorrow, the 5th (Friday).



#Snow commentary
Snow depth as of 10am today, Thursday, April 4th (preliminary figures from AMeDAS)
+Tochigi Prefecture
Torobe, Nikko City 29cm
Oku-Nikko Chuzenji Lakeside 16cm
Nasu Highlands 14cm
+Gunma Prefecture
Minakami-cho Fujiwara 38cm
Minakami-cho Yubara 25cm
+Nagano Prefecture
Shinanomachi 24cm
Iiyama 15cm
Nozawa Onsen 14cm

#Snow forecast
24-hour snowfall forecast by noon on Friday the 5th (in areas with the most)
Northern Kanto region 15cm
Koshin region 20cm



In Nagano Prefecture and the northern Kanto region, please be aware of traffic disruptions due to snowfall and frozen roads through the evening of Thursday, April 4th.
Also, please be careful of avalanches into tomorrow, the 5th (Friday).

Beware of heavy snow in the Tohoku region until noon tomorrow; Beware of traffic disturbances in the northern Kanto region

2025/12/04 06:47

There is a low pressure system east of Japan, moving northeast. The low pressure system is rapidly developing and is expected to move toward the Kamchatka Peninsula by the evening of today, the 4th (Thursday), and a winter-like pressure pattern is expected to strengthen near Japan. The winter-like atmospheric pressure pattern will continue into tomorrow, the 5th (Friday). In addition, strong cold air for this time of year is flowing into the Tohoku region at around 5,000 meters above the ground, below -36 degrees Celsius, and into the Kanto-Koshin region below -30 degrees Celsius.

As of 6:30 a.m., a blizzard warning has been issued for the coastal areas of Akita and Yamagata prefectures, and a heavy snow warning has been issued for Gunma and Nagano prefectures.

On the Sea of Japan side of Tohoku, the wind from the west is very strong and is accompanied by snow, which will cause heavy turbulence on the sea. In addition, heavy snow is expected in some places in the Tohoku region.
Also, strong cold air is flowing into the sky, making the atmosphere extremely unstable, and cumulonimbus clouds are expected to develop in some places, causing thunderstorms.
There will be heavy snow in some places in Nagano Prefecture and the northern Kanto region until noon today, the 4th (Thursday).



#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected today, the 4th (Thursday)
Tohoku Sea of Japan side Sea Top 20m/s (30m/s)
Tohoku Sea of Japan side Land 18m/s (30m/s)
Tohoku Pacific side Sea 18m/ s (30m/s)
Tohoku Pacific side land 13m/s (25m/s)

#Expected wave height
+Today 4th Expected wave height
on (Thursday) Tohoku Sea of Japan side 6m
Tohoku Pacific side 4m

#Expected amount of snow (in places with a lot of it)
+Snowfall forecast for 24 hours by 6:00 tomorrow, the 5th (Friday)
Tohoku Sea of Japan side, along mountains 70cm
Tohoku Sea of Japan side, flat land 40cm
Tohoku Pacific side, mountainside 70cm
Tohoku Pacific side flat land 30cm
Northern Kanto region 20cm
Koshin Region 30cm


#Disaster Prevention Matters
On the Sea of Japan side of Tohoku, please be on guard for damage to traffic and buildings due to stormy winds from the west accompanied by snow into the morning of today, Thursday, April 4th.On the Sea of Japan side of Tohoku, please be on guard against damage to ships and coastal facilities due to high waves. In addition, in the Tohoku region, please be careful of traffic disruptions due to heavy snow, snow falling from roofs, damage to buildings and agricultural facilities, etc., and be careful of snow accretion on power lines and trees and avalanches until noon on Friday the 5th tomorrow.
Please be careful of tornadoes, strong gusts of wind, lightning, and hail, mainly on the Sea of Japan side of Tohoku, until noon tomorrow, Friday the 5th.

In Nagano Prefecture and the northern Kanto region, please be on guard for traffic disruptions due to snowfall and frozen roads until noon today, the 4th (Thursday). Also, be careful of snow accretion and avalanches on power lines, trees, etc.

Today's weather on the 4th (Thursday): Beware of heavy snow on the Sea of ??Japan side; sunny in many places on the Pacific side

2025/12/04 06:15

Today, the 4th (Thursday), there will be a strong winter-like atmospheric pressure pattern near Japan. It is necessary to be wary of heavy snow especially in northern Japan and Hokuriku. On the other hand, many places on the Pacific side will be sunny and the air will be dry.



There will be snow and rain across a wide area along the Sea of Japan, including Hokkaido, Tohoku, and Hokuriku. Heavy snowfall is expected, especially along the mountains, and snowfall is likely to increase rapidly. There are many places where even flat areas are covered with snow, so please be careful of deteriorating road conditions. There will also be strong winds, and there may be some places where it snows, such as along the coast. You also need to be careful about poor visibility due to snowstorms.

The weather in the Sanin area is likely to rain or snow until around noon.

It will be sunny in many places on the Pacific side. The wind is strong and the air is dry, so please be careful when handling fire.

Due to the effects of cold air, the temperature throughout the country will not rise, and it will be cold in the middle of winter. Please be sure to protect yourself from the cold.

[Kanto-Koshin heavy snow] General Winter will attack tonight!! Warning-level heavy snow is feared in Nagano Prefecture and northern Kanto, affecting transportation

2025/12/03 16:19

Due to the strengthening of winter-like atmospheric pressure patterns, heavy snowfall is expected in some places in Nagano Prefecture and northern Kanto from the night of today, the 3rd (Wednesday) to the early afternoon of tomorrow, the 4th (Thursday).

A winter-like atmospheric pressure pattern is expected to strengthen near Japan from Wednesday night today, the 3rd, to Thursday, the 4th, and strong cold air for this time of year, with temperatures below -30 C, is expected to flow approximately 5,500 meters above Kanto-Koshin.
As a result, there will be heavy snowfall in some places in Nagano Prefecture and northern Kanto from the night of today, the 3rd (Wednesday) until noon on the 4th (Thursday) tomorrow.



#Nagano Prefecture
Intermittent heavy snow is expected to fall mainly along the mountains in the north and in the Nakano-Iiyama area.
Please be on guard for traffic disruptions due to heavy snow and frozen roads from early morning until noon tomorrow, Thursday the 4th.
[Snow forecast]
Forecasted snowfall amount for 24 hours until noon on Thursday the 4th (in areas with the most)
Nakano Iiyama area 40cm
Along the mountains in the Nagano region, along the mountains in the Great Kita region 30cm
The plains in the Great Kita region, around Sugadaira in the Ueda region 15cm
The plains in the Norikura Kamikochi region, Kiso region, Nagano region 10cm

Until noon on the 5th (Friday) the day after Forecast 24-hour snowfall (in areas with the most)
Along the mountains in the Great North area 20cm
Along the mountains in the Nagano area Nakano-Iiyama area 15cm
(Indicate areas where 10cm or more is expected)



#Gunma Prefecture
There will be heavy snow in some places in the northern mountains from today's 3rd (Wednesday) night to tomorrow 4th (Thursday).
It is expected that there will be snowfall in some places even on the flatlands in the southern part of the country.
From early morning until noon on the 4th (Thursday) tomorrow, please be careful of traffic disruptions caused by heavy snow, and be careful of frozen roads, snow accretion on power lines and trees, and avalanches.
[Snow forecast]
Forecasted snowfall amount for 24 hours until the morning of tomorrow 4th (Thursday) (in areas with the most)
Mountains in the Tone/Numata region 40cm
Mountains in the Azuma region 20cm
Plains in the north, mountains in the south 4cm
Southern plains 1cm

Northern plains, southern mountains 1cm
(Mountainous areas are areas with an altitude of 500m or higher)

#Yamanashi Prefecture
In the central and western regions, there will be snow and rain in some places from late at night today, the 3rd (Wednesday) to early morning on the 4th (Thursday), and there will be snowfall in the mountains in the central and northern regions and in the Kyonan region.
Please be aware of traffic obstructions and icy roads due to snowfall.
[Snow Forecast]
Forecasted snowfall amount for the next 24 hours until noon on the 4th (Thursday) (in areas with the most)
Central north region mountains 2cm
Kyonan region 1cm

If the cold air above becomes stronger than expected or if snow clouds develop more than expected, there is a possibility of warning-level heavy snowfall.

[Frigid Archipelago] The most intense cold of the season, heavy snowfall and strong winds. Tomorrow, the temperature will be below freezing even during the day, even in the middle of winter.

2025/12/03 12:10

The strongest cold air of the season is expected to invade the skies over the Japanese archipelago tonight through Thursday the 4th tomorrow.



Cold air forecast for tomorrow morning.

A strong winter-like atmospheric pressure pattern will develop around Japan by tomorrow, and
the region around Honshu is expected to be completely covered in dark light blue areas and cold air (less than -6 degrees Celsius at around 1500m above sea level) that will bring snow to the plains.

Furthermore, cold air (less than -12 degrees Celsius at around 1500m above the ground) will move southward, bringing heavy snow even on flatlands, to the southern part of Tohoku.

At this time in a normal year, the temperature above Akita Prefecture is about -5c,
even in late January, in the middle of winter, it is about -10c, so it can be said that
it is a strong cold that is below the level of ``midwinter''.



#Snow in Nagoya and Kyoto There is also a risk of snow accumulation in flat areas

Looking at the snow, rain, and wind forecast for tomorrow morning,
strong winds will blow generally from the northwest,
and snow is expected to fall widely, mainly from the San'in area to the north on the Japan Sea side.

There will be heavy snow in northern Japan, Hokuriku, and the Sanin area, and
there will be blizzards accompanied by strong winds.

Next-westerly winds may bring snow clouds to some parts of the Pacific Ocean,
Nagoya, Kyoto, and other areas are also expected to experience snow, and there will be snowfall not only in the mountains, but also
on the flatlands.

The snow may also affect transportation such as expressways and Shinkansen trains.

Check the latest weather and traffic information, and be sure to use winter tires when driving over mountain passes.



There is a risk of warning-level heavy snow, especially along the mountains of Tohoku, Kanto-Koshin, and in the Sanin area.
The expected 24-hour snowfall is expected to be heavy in some places

until 6 a.m. on Thursday the 4th.
Tohoku Sea of Japan side, along the mountains 70 cm
Tohoku Sea of Japan side, flat land 30 cm
Tohoku Pacific side, along the mountains 70 cm
Tohoku Pacific side, flat land 30 cm
Northern Kanto region Area 40 cm
Koshin region 40 cm

Tomorrow 4th (Thursday) 6:00 a.m. to 5th (Friday) 6:00 a.m.
Tohoku Sea of Japan side along mountains 70 cm
Tohoku Sea of Japan side flat land The forecast is 30 cm
, Tohoku Pacific side, along the mountains, 50 cm
, Tohoku Pacific side, flat land, 20 cm
, northern Kanto region, 20 cm
, Koshin region, 20 cm
.



In addition, strong winds will blow from the west, mainly in the Tohoku region, and there is a risk of heavy snow falling with the strong winds.

The maximum wind speed (maximum instantaneous wind speed) expected from today, the 3rd (Wednesday) to the 4th (Thursday), is
Tohoku Sea of Japan side, sea, 20 meters (30 meters)
Tohoku Japan Sea side, on land 15 meters (30 meters)
Tohoku Pacific side, ocean 20 meters (30 meters)
Tohoku Pacific side, land 15 meters (30 meters)

.

Be careful of poor visibility when driving.
When driving during a snowstorm, be sure to turn on your lights even during the day.



Tomorrow will be a mid-winter cold,
It looks like it will be quite cold in the morning.

The expected minimum temperature for tomorrow morning is 4c in Tokyo and Osaka, 2c in Nagoya, 1c in Sendai
-4c in Aomori, and -5c in Sapporo.

In northern Japan, there are places in the middle of winter when the temperature does not reach 0c even during the day, so
Please be careful not to get sick from the sudden severe cold.

General Winter will attack from tomorrow. [Ministry of Land, Infrastructure, Transport and Tourism] also calls for heavy snowfall

2025/12/02 15:31

From tomorrow, December 3rd (Wednesday) to December 4th (Thursday), a winter-like atmospheric pressure pattern will be strengthened near
Japan, and extremely cold air, colder than midwinter, is expected to flow into the sky above
.



Looking at the forecast for cold air at midnight on the 4th (Thursday),
cold air that will bring snow on the plains (-6 degrees Celsius or lower at around 1500 meters above the ground) is expected to flow from southern Kyushu to Kinki, Tokai, and northern Kanto.

Even stronger cold air, below -12c, will flow into Akita.

The average cold in early December is around -5.0c,
even in the middle of winter it is around -10c, so we are expecting a strong cold (winter shogun) colder than
midwinter.

Yesterday, December 1st (Monday) and today, December 2nd (Tuesday), it was warm and

As many places experienced early spring weather,
the coldness of mid-winter will arrive all at once, and the temperature difference will be severe.



Furthermore, snow will fall mainly on the Sea of Japan side of northern and western Japan,
in addition to heavy snowfall in the mountains, there is also the possibility of snow accumulation on flatlands.

It looks like there will be many places in western Japan and the Tokai region where the first snow will be observed.

In addition, extremely strong winds will blow from the Tohoku region to the Hokuriku region,
causing a blizzard and there is a risk of sea barges.


The Ministry of Land, Infrastructure, Transport and Tourism has issued an announcement to be on guard against heavy snow and blizzards starting tomorrow.



+If it is unavoidable for drivers to drive, please make sure to install
winter tires, check in advance how to install chains, carry them with you,
as early as possible, and carry winter equipment such as shovels and sand.

In addition, due to snowfall conditions, large areas of expressways and national highways parallel to them may be closed at the same time.
We ask for your cooperation in implementing wide-area detours and reviewing traffic routes.


+During heavy snowfall in the past, the main cause was large vehicles getting stuck,
causing a huge impact.
Transport operators are required to take the necessary measures to ensure
safety, such as
ensuring that commercial vehicles are equipped with winter tires, when there is a risk of hindering transportation safety, such as during heavy snowfall.

In addition, in the event of a malicious stranding on a snowy road, such as neglecting to take necessary measures,
will be subject to administrative sanctions after confirming the facts through an audit and if it is determined that the measures taken are insufficient.
Please perform appropriate operation management.
On the other hand, shippers are also asked to refrain from making urgent transportation requests to trucking companies.

+In areas where heavy snow is expected, there is a risk of large-scale and long-term delays or suspensions of public transportation.

+Please pay attention to the latest weather and traffic information, and in areas where heavy snow is expected,
please refrain from going out for non-essential reasons, including using telework.
If you need to go out, please allow sufficient time.

[Ocean Summary] Storm warning issued in northern Japan due to high pressure in the west and low pressure in the east. Waves are widely rising and wave height exceeds 5m in some places (November 23rd to November 29th)

2025/12/02 12:42

Near Japan, the atmospheric pressure was often high in the west and low in the east, and the gradient of the atmospheric pressure became large.
Winds were increasing widely and strong wind warnings were issued in some parts of northern Japan, where the area is close to low pressure.
The waves were so high that in some places it became a barge.
Below is a summary of the ocean (November 23rd to November 29th)



#Pressure distribution and waves
From the 26th to the 29th, the Nansei Islands became the southern edge of the continental high-pressure system, and a state of large pressure gradient continued.
In the waters near the Nansei Islands, high waves continued, mainly south of Okinawa.
On the 26th, the pressure around Honshu was high in the west and low in the east, and between the low pressure east of Japan and the high pressure in the East China Sea, the pressure gradient became large and waves became high over a wide area.
On the 27th, the gradient in atmospheric pressure increased between a low pressure system far east of Japan and a high pressure system east of Japan, and waves became high in the east of Japan.
On the 28th and 29th, a low pressure system east of Japan moved eastward, and a low pressure system over the Sea of Okhotsk moved northeast.
Once again, the atmospheric pressure around Japan was high in the west and low in the east.
The pressure gradient became larger between these low pressure systems and the high pressure systems moving from the continent to the vicinity of Japan.
In northern Japan near the low pressure system, storm warnings were issued in some places.
On the 28th, waves rose in the waters near Japan, with waves rising in southeastern Hokkaido and the central and western parts of the Sea of Japan, and exceeding 5 meters in height off the coast of Noto.
On the 29th, it became a barge in the middle and northern part of the Sea of Japan, the Sea of Okhotsk, and the east of Japan.



#Sea surface temperature
Sea surface temperatures in the Japanese waters continued to be lower than normal along the coast of Hokkaido.
In the central and western parts of the country, sea areas with temperatures higher than normal or significantly higher expanded, with temperatures up to 3 C higher than normal.
The East China Sea has expanded to a normal level.
Western Kyushu was slightly higher than normal.
Sea areas south of Japan continued to be at normal levels, while areas off the coast of the Tokai Sea and near the Izu Islands expanded in areas with lower than normal levels.
The temperature in the east of Japan was significantly higher than normal, with a maximum of 4 C above normal.
The waters off the coast of Sanriku were at normal levels, the southeastern part of Hokkaido was significantly lower than normal, and the Sea of Okhotsk continued to be at normal levels.