Japan Meteorological Agency Announces Warning Information for Later Earthquakes off the coast of Sanriku, Hokkaido

2025/12/09 07:33

The Japan Meteorological Agency canceled all tsunami advisories that had been issued for the coasts of Hokkaido and the Tohoku region at around 6:20 a.m. today, the 9th (Tuesday).
On the other hand, at 2 a.m., the government announced the ``Warning Information for Later Earthquakes off the coast of Hokkaido and Sanriku.''

This information indicates that due to the occurrence of this earthquake, the possibility of a new large-scale earthquake occurring in the assumed epicenter area of the mega-earthquake from off the coast of Nemuro in Hokkaido to off the coast of Sanriku in the Tohoku region has increased relatively compared to normal times.
However, although the possibility of a new large-scale earthquake occurring has increased compared to normal times, the probability is low at around 1 in 100
based on past global events, and this information is not intended to inform you that a large-scale earthquake will definitely occur during a specific period.

Please take this opportunity to once again check evacuation locations, routes, evacuation shelters, drinking water, food,
emergency items, etc.

#Notes regarding information
+This information is intended to inform you that the possibility of a large-scale earthquake occurring is
relatively high compared to normal times, and is not intended to inform you that a large-scale earthquake will definitely occur
during a specific period.

+It is most important to keep in mind that large-scale earthquakes of Mw 8 class or higher often occur suddenly without any information
being released to alert people to subsequent earthquakes, and to thoroughly prepare for earthquakes on a daily basis.

+It is important to prepare for a huge earthquake with the largest class of tsunamis, but it is also necessary to prepare for earthquakes that are slightly smaller in scale but have a higher probability of occurring than the largest class of earthquakes, and earthquakes that shake strongly directly above
and occur in relatively shallow areas.

+Even outside the assumed epicenter area of a huge earthquake (from off the coast of Nemuro in Hokkaido to off the coast of Sanriku in the Tohoku region), caution is necessary as there is a possibility of a large-scale earthquake occurring in the vicinity of the previous earthquake.

+The probability of a subsequent earthquake occurring decreases the longer time passes since the earlier earthquake occurred, and the further away from the epicenter of the earlier earthquake.

+The probability that a subsequent earthquake will occur decreases as the magnitude of the subsequent earthquake increases, and the possibility that a subsequent earthquake of the
maximum class will occur becomes even lower.

Low-pressure system develops over the weekend, widespread stormy weather; first high temperature of the season expected in the city center - single digits or 9 degrees Celsius

2025/12/08 12:16

Weekly Weather Forecast
#High pressure in the west and low in the east in short cycles
#12th (Friday): Stormy weather on the Sea of Japan side of northern Japan due to winter-like pressure distribution
#Over the weekend, a developing low pressure system will pass through, widespread stormy weather in western and northern Japan
#Weekend, maximum temperature expected to be 9 degrees Celsius in central Tokyo; first high temperature of the season in single digits



#Air pressure will be high in the west and low in the east in short cycles
Over the next week, the pressure will be high in the west and low in the east in short cycles, and cold air will move southward.
A low-pressure system will move toward the Kamchatka Peninsula tomorrow, the 9th (Tuesday), and the area around Japan is expected to have a temporary high-to-the-west pressure pattern with low-to-the-east pressure.
It looks like there will be some rain or snow in the San'in region and northern Kinki region until the morning, but it will gradually clear up.
It is expected to rain gradually in Hokuriku, and it will snow intermittently on the Sea of Japan side of northern Japan.
As the cold air moves south, there will be some snow on the Sea of Japan side of northern Japan from tomorrow until the 10th (Wednesday).
It is expected to be sunny in many places on the Pacific side.

#12th (Friday) Stormy weather on the Sea of Japan side of northern Japan due to winter-like atmospheric pressure distribution



On the 11th (Thursday), a low pressure system will form in the Sea of Japan, pass through northern Japan, and move toward the waters near the Kuril Islands.
As the continental high pressure system protrudes, the area around Japan is expected to experience a winter-like atmospheric pressure pattern with high pressure in the west and low pressure in the east.
On the 11th (Thursday), there will be rain in Kyushu, Sanin, and northern Kinki, rain and snow in Hokuriku and the Sea of Japan side of Tohoku, and snow in some places on the Sea of Japan side of Hokkaido.
On Friday the 12th, there will be rain and snow in the San'in area and northern Kinki region, snow and rain along the mountains in northern Nagano prefecture and northern Kanto region, Hokuriku, and snow in places on the Sea of Japan side of northern Japan.
Winds are increasing across the country, and especially on the Sea of Japan side of Hokkaido, there will be stormy winds, blizzards, and rough weather.
Depending on the strength of the winter-like air pressure distribution, there is a risk of severe storms.





#A low pressure system will develop and pass over the weekend, causing widespread stormy weather across western and northern Japan.
Over the weekend, a low pressure system will develop and pass near Japan, causing severe weather over a wide area.
On the 13th (Saturday), a low pressure system will move eastward over the western Japan Sea and the south of western Japan, causing rain in western Japan and the Tokai region, and snow on the Sea of Japan side of northern Japan.
On the 14th (Sunday), the low pressure system in the Sea of Japan will move towards northern Japan, and the low pressure system off the southern coast of Honshu will move off the coast of Sanriku.
It is expected to rain widely from Okinawa to Tohoku, and it will snow in some places in Hokkaido.
Due to the developing low pressure system, there is a risk of widespread rain and wind, leading to stormy weather. Please pay attention to the latest information.
After this low-pressure system moves eastward, the winter-like pressure pattern will become stronger, and it is possible that even stronger cold air will move southward.

# Weekend maximum temperature expected to be 9 degrees Celsius in central Tokyo; first high temperature of the season in the single digits
On the 11th (Thursday), many places are expected to have higher than normal temperatures. However, in a complete change, from the 12th (Friday) to the 13th (Saturday), there will be a winter-like atmospheric pressure distribution, and there will be many places where the temperature will be lower than normal.
On Saturday the 13th, the maximum temperature in the city is expected to be 9c.
Please take proper measures to protect yourself from the cold so that you do not get sick due to daily temperature changes.

It's another warm day in eastern and western Japan. Temperatures in northern Japan are lower than the day before.

2025/12/08 06:41

Today, the 8th (Monday), eastern and western Japan will be covered in warm air, with many places experiencing higher-than-normal temperatures. On the other hand, northern Japan will have a winter-like atmospheric pressure pattern, and as cold air flows into the upper atmosphere, temperatures are expected to drop in many places compared to the previous day.



The predicted maximum temperature is Sapporo: 4c, Sendai: 16c, Tokyo: 19c, Nagoya: 16c, Kanazawa: 14c, Osaka: 18c, Kochi: 19c, Fukuoka: 17c.

In eastern and western Japan, temperatures tend to rise mainly in areas that receive sunlight, and it is likely to be a day where you can feel the warmth of the sunlight during the day. It gets cold in the mornings and evenings, so please be aware of the temperature difference between morning and evening and daytime.
As cold air gradually flows into northern Japan, it gets colder at night than in the morning. When going out, you need to be careful when choosing your clothes.

Weather today, the 8th (Monday): Rough weather in northern Japan, easy day in Kanto

2025/12/08 06:22

Today, the 8th (Monday), a developing low pressure system will pass over northern Japan. In northern Japan, you need to be careful about the rough weather with strong rain and wind.
It will be sunny in many places from Kanto to the west.



As the low pressure approaches, many places in Hokkaido will gradually experience snow and rain. Rain is expected to fall in many places in Tohoku and Hokuriku, mainly in the morning. The rain will temporarily become stronger and may turn into thunderstorms in some places, so be careful of lightning, hail, and sudden heavy rain.
In the afternoon, cold air will gradually flow in, and even flat areas in Tohoku will likely turn to snow in some places. The wind will also be strong, so please be careful in Hokkaido due to poor visibility due to blizzard.

From Kanto to the west, there are many places where sunlight reaches, mainly on the Pacific Ocean side. You can feel the warmth of the sunlight during the day.
There is a possibility of showers on the Sea of Japan side of western Japan, such as in the San-in region, so it is a good idea to bring a foldable umbrella when going out.

[Weekly Weather] Northern Japan has a periodic winter-like atmospheric pressure pattern. There is also a risk of severe weather over a wide area next weekend.

2025/12/07 18:43

There is a low pressure system off the coast of Sanriku and it is moving northeast.
There is also a low pressure system in Primorye and northeastern China, which is moving northeast.
On the other hand, there is a high pressure system moving eastward in the East China Sea, and it is spreading from west to east Japan.
Currently, there is a pressure trough in northern Japan, and rain and snow are falling in places from Hokkaido to Hokuriku, mainly on the Sea of Japan side of
.

Tomorrow, the 8th (Monday), a low pressure system accompanied by a front is expected to develop and pass from the Sea of Japan to northern Japan.
From eastern Japan to western Japan and the Amami-Okinawa region, it will be sunny in many places, especially on the Pacific side, but in northern Japan and rural areas, atmospheric conditions will be extremely unstable due to the effects of warm, humid air flowing toward low pressure systems and fronts, and cold air above.
Cumulonimbus clouds are expected to develop and heavy rain with thunder is expected in some places.
In the northern part of Tohoku on the Sea of Japan side, please be careful of landslides caused by heavy rain until the evening of the 8th.
The ground has become loose in some places due to previous rains, so even a small amount of rain could increase the risk of landslides and lead to warning-level heavy rain.
Also, in Hokkaido, Tohoku, and the Hokuriku region, be careful of strong gusts of wind such as tornadoes, lightning, hail, and sudden heavy rain.

After the front passes, the pressure will become winter-like, with high pressure in the west and low pressure in the east.
At night, there will be many places where the snow will turn to snow.
It is expected that there will be places where it will rain or snow even in the San'in region on the Sea of Japan side.



Tuesday, the 9th, will be a winter-type pressure pattern with high pressure in the west and low pressure in the east.
As a result, there will be snow and rain on the Sea of Japan side from Hokkaido to the Hokuriku region.
It is expected to be sunny in many places on the Pacific side.



10 (Wednesday) will be covered by a mobile high pressure system centered on western and eastern Japan, and the winter-like pressure distribution will be relaxed. However, on the Sea of Japan side of northern Japan, clouds tend to spread due to cold air, and there may be places where it rains or snows.

Later in the week, on the 11th (Thursday), a pressure trough will pass through northern Japan. Then, around the 12th (Friday), the atmospheric pressure will become winter-like again.





Also, over the weekend from the 13th (Saturday) to the 14th (Sunday), a low pressure system is expected to develop and pass near Japan.
The weather will deteriorate over a wide area around Japan, and depending on the degree of development and course of the low pressure system, the weather may become rough.
After that, the winter-like atmospheric pressure pattern will strengthen, and there is a risk that even stronger cold air will move south, causing snow to fall over a wide area, mainly on the Sea of Japan side.

Please pay attention to future information.

Weather for the week: Rain and snow continue in northern Japan and Hokuriku. Be careful of stormy weather next weekend around the 14th.

2025/12/07 07:10

From now on, rain and snow will continue from the Sea of Japan side of northern Japan to Hokuriku, and sunny weather will continue along the Pacific side of eastern and western Japan. Next weekend, the passage of a low-pressure system will cause the weather to deteriorate over a wide area, and there is a possibility of rough weather on the Sea of Japan side.



Tomorrow, the 8th (Monday), a low pressure system will pass near northern Japan, bringing rain and snow from the Sea of Japan side of northern Japan to Hokuriku. Snow may increase along the mountains of northern Japan due to the effects of cold air above.



After the low pressure passes, there will be a temporary winter-like pressure distribution. On the 9th (Tuesday), as the cold air moves southward, snow is expected to spread across the mountains of Hokuriku.
Even after that, the region from northern Japan to Hokuriku is likely to be affected by low pressure systems and low pressure troughs, and rain and snow are expected to continue. On the other hand, from eastern to western Japan, sunny weather will continue. The air tends to be dry, and it gets even colder in the mornings and evenings, so please try not to get sick. Also, be careful when handling sources of fire.

From around the 13th (Saturday) to the 14th (Sunday), a low pressure system is expected to advance from the west and continue to develop as it moves through the Sea of Japan. As a result, the weather is expected to deteriorate over a wide area around Honshu from around the 13th (Saturday) to the 14th (Sunday), and the Sea of Japan side may experience rough weather with strong rain, snow, and strong winds. In addition, after the low pressure system passes, the winter-like pressure pattern may become stronger, and strong cold air in the upper atmosphere may move southward.

At this point, there is a wide range of predictions regarding the path of the low pressure system, the degree of development, the strength of the cold air moving south, etc., but please pay close attention to future information.

Tomorrow, the 7th (Sunday), the cold will ease and it will be sunny mainly on the Pacific side of western and eastern Japan. Be careful of rain and thunderstorms on the Sea of ??Japan side of northern Japan and Hokuriku.

2025/12/06 20:21

Tomorrow, the 7th (Sunday), a trough of atmospheric pressure will pass through northern Japan, and eastern and western Japan will be covered in high pressure. Warm air will more easily flow from the high pressure system in the south to the low pressure system in the north, so the cold will ease in many places, and temperatures are likely to be higher than normal.



Western and eastern Japan will be stable and sunny, mainly on the Pacific side. However, the air tends to dry out, so care must be taken when handling sources of fire. Use lip balm, hand cream, etc. to prevent dry skin.



Atmospheric conditions will be unstable in northern Japan and Hokuriku due to a trough in atmospheric pressure. In Hokkaido and the Tohoku region on the Sea of Japan side, rain will start and stop, and there will likely be some places in Niigata and Ishikawa prefectures where rain clouds will form. The predicted probability of lightning strikes is particularly high on the Sea of Japan side of the Tohoku region, where thunderclouds are likely to develop. Please be aware of changes in the sky, as there may be thunderstorms, tornadoes, severe gusts of wind, and hail.

Also, many places are expected to experience rain instead of snow, such as the flatlands of Hokkaido and the mountains of Tohoku. In areas with heavy snowfall, the risk of avalanches and falling snow increases, so please be careful.

Saturdays, Sundays, and winter weather in many places. [Good days for cleaning] What are the recommended spring cleaning activities based on the weather

2025/12/06 12:04

The first weekend in December is covered by high pressure, and many places are sunny.

After this, western and eastern Japan will be covered by an anticyclone, and mild winter skies are expected to continue into the 7th (Sunday).

On the other hand, northern Japan is on the edge of a high-pressure system,
with the influence of moist air flowing in, leading to rain and thunderstorms in some places in the afternoon.
Even if it's sunny now, you need to be careful about sudden changes in the weather.



Due to the cold air, the cold will continue until the morning of tomorrow, the 7th (Sunday), but
from the daytime on the 7th (Sunday), the cold will ease.
The temperature in western and eastern Japan will rise to around 15-20c, and
the sun will feel warm during the day.


This weekend's weather will be relatively calm, and it won't be too cold, so it looks like it will be a perfect day for cleaning.


Did you know that this "spring cleaning" can be done more efficiently by changing the location
depending on the weather


First of all,
Recommended places for cleaning on sunny days, like this weekend on the Pacific Ocean side...



Sunny days have the advantage of low humidity, moisture evaporates quickly, and dries quickly,
making it easy to ventilate.

For this reason, cleaning the floors, ventilation of closets, and
cleaning on wet days are suitable for cleaning on sunny days.





On the other hand, cloudy days are more humid than sunny days.

When it rains, the window glass gets wet and gets dirty again even if you clean it, so
"Window cleaning" is recommended on cloudy days.

Appropriate humidity makes it easier to remove dirt.

Also, when the sky is sunny, the sunlight reflects and it becomes difficult to see the dirt on the window glass, but when the sky is cloudy, the dirt on the window glass becomes easier to see.



When it's raining, we recommend ``sweeping'' the areas that should be cleaned, taking advantage of the

moisture that prevents dust and fallen leaves from flying up
.

Also, after the rain, we recommend cleaning the balcony while it's still wet.

Tonight is the last full moon of the year!!Cold moon.What's the weather like tonight

2025/12/05 16:00

Today, the 5th (Friday), is the last full moon of the year.
December's full moon is called the "cold moon." It is said that Native Americans gave each full moon a name to use as a guide for farming and hunting, and December came to be called the ``cold moon'' because it appears during a period of severe cold.



The last full moon of the year reached its full moon today, the 5th (Friday) at 8:14 am.
The sun sets in Tokyo at 4:27 p.m. and the moon rises at 4:23 p.m.

Today, the 5th (Friday), the area around Japan has a winter-like atmospheric pressure pattern.
Tonight, the continental high pressure system will advance near Japan, and the winter-like pressure pattern will gradually loosen around western Japan.

Okinawa is on the edge of a high-pressure system, so there will be a lot of clouds and showers.
However, there may be a chance to see the full moon through the clouds.
It seems like you can see the full moon perfectly in Kyushu.
The clouds will gradually clear in Shikoku and Sanyo, and there will be more places where you can observe them.
In the San'in region and northern Kinki region, the rain and snow will gradually stop, and there may be a chance to see the full moon late at night.
The Pacific Ocean, from the southern Kinki region to the southern Tohoku region, will have clear skies and be able to enjoy the last full moon of the year.
The area of rain and snow in Hokuriku is expected to gradually narrow down, but clouds are likely to remain.
The Sea of Japan side of southern Tohoku, the northern part of Tohoku, and the Sea of Japan side of Hokkaido will experience snow and rain, making the sky unfavorable for observing the full moon.
On the Pacific side of Hokkaido, the sky is clearer at the beginning of the night, so the chances of observing it are likely to be high.



Tonight, the temperature will drop to around 5c even in the flatlands of western and eastern Japan, so when enjoying the full moon outdoors, please be sure to take precautions against the cold, such as down coats, scarves, and gloves.
Also, there are places where there is snow or frozen roads, so please be careful where you step.

After a sudden change from the intense cold, the Pacific side continues to be sunny and dry. What will be the next stormy weather [Weekly weather]

2025/12/05 12:12

Due to the arrival of the strongest cold air of the season,
heavy snow fell from the night of December 3rd (Wednesday) the day before yesterday to yesterday, December 4th (Thursday), mainly on the Sea of Japan side.



Looking at the snowfall amount for the 48 hours up to 10 a.m. today, the 5th (Friday),

Hinoedagi Village, Fukushima Prefecture Hinoedagi 66cm
Uonuma City, Niigata Prefecture Shumon 60cm
Aomori City Sukayu 57cm
Shirakawa Village, Gifu Prefecture Shirakawa 47cm
Daisen Town, Tottori Prefecture The snowfall amount was 21cm
, and the amount of snowfall increased mainly along the mountains from northern Japan to western Japan.

Today (Friday), a winter-like atmospheric pressure pattern will continue mainly in northern Japan, but
the strong cold air in the upper atmosphere will gradually dissipate, so the snow and rain in northern Japan and Hokuriku are expected to gradually stop in the afternoon.

On the other hand, the Pacific side of western and eastern Japan is likely to be sunny and sunny.

Although the temperature will be higher than yesterday, the cold will continue, so
Please stay warm today.



Tomorrow and the day after Saturday and Sunday, a band of high pressure systems is expected to pass around Honshu one after another.

As a result, it will be sunny across the Pacific Ocean, and many places on the Sea of Japan side, such as the Sanin and Hokuriku regions, will also be sunny.

Meanwhile, in northern Japan, rain will begin to fall from the Japan Sea side from the evening of the 6th (Saturday) due to the moist air around the edges of the high pressure system and the approach of the low pressure system.

On the 7th (Sunday), it seems likely that there will be rain not only on the Sea of Japan side of northern Japan, but also
on the Pacific side.

The cold air will be receding on Saturday and Sunday, so most of what will fall will be rain rather than snow.



Looking at the weekly weather, we see that in northern Japan, low pressure systems and fronts approach periodically
There are periods of rain and snow, but
western and eastern Japan are on the path of high pressure, making it difficult for strong cold air to flow into the area.

It will continue to be sunny, especially on the Pacific side, and the air will continue to be parched and dry.

Be careful when handling fire and keep your skin and throat moisturized.




Looking at the weekly forecast with an eye on the temperature, the cold will continue until the morning of the 7th (Sunday).

From the middle of the day on the 7th, the cold will ease up and the sun will feel warm.

Although there are some daily differences in temperature,
there will be many days that will be ``small spring weather'' into next week.

Although snow, rain, and wind will temporarily increase in northern Japan around the 9th (Tuesday),
the next widespread change in weather is likely to occur next weekend around the 13th (Saturday).