[Typhoon No. 23] Last day of the holidays, closest to the Izu Islands from dawn to noon, strict vigilance

2025/10/13 00:22

Typhoon No. 23 is approaching the Izu Islands, where the risk of disaster is increasing due to record heavy rain, strong winds, and high waves caused by Typhoon No. 22 on the 9th.
Please refrain from going out unless necessary and on the 13th (Monday), and be extremely cautious of the strong winds by staying away from windows when indoors. Also, be wary of high waves, landslides, flooding of low-lying areas, and rising and flooding rivers.

As of 23:00 on the 12th, Typhoon No. 23 is located approximately 270km west-southwest of Aogashima and is moving east-northeast at a speed of approximately 25km/hr.
Also, a front is extending from the Izu Islands to the east of Japan. In the Izu Islands, the atmospheric conditions are extremely unstable due to the influence of warm and humid air flowing towards the
front, and some places have already observed rainfall of over 100mm
from 11 a.m. on the 11th to 10 p.m. on the 12th.

[Rain commentary]
+Aogashima 153.0mm
+Miyakejima Tsubota 119.5mm




The typhoon is expected to move east-northeast over the southern coast of Honshu while developing strong winds, and is expected to be strong from dawn to noon on the 13th, approaching the Izu Islands, which was damaged by Typhoon No. 22.

In the Izu Islands, there is a risk that some utility poles may collapse and some buildings may be blown away over a wide area from the dawn of the 13th until the morning of the 13th due to the approaching typhoon.
There will be strong winds in some places.

[Wind Forecast] Maximum wind speed (maximum instantaneous wind speed)
13th (Monday)
+Izu Islands 35 meters (50 meters)

In the Izu Islands, from early morning until evening on the 13th, there will be places where there will be heavy swells and strong winds.

[Wave Forecast]
13th (Monday)
+Izu Islands 9 meters with swells
+Kanto region 4 meters with swells

In the Izu Islands, there are some places where it will rain heavily with thunder into the afternoon of the 13th,
, and there will be heavy rain in some places from early morning until the morning of the 13th.

[Rain forecast (in areas with a lot of rain)]
The predicted hourly precipitation on the 13th is
+Izu Islands 80mm
The 24-hour precipitation expected from 0:00 on the 13th to 0:00 on the 14th is
+Southern Kanto region 50mm
+Izu Islands 250mm

.
Please pay attention to typhoon information and disaster prevention information that will be announced in the future.

[Typhoon No. 23] Approaching the Izu Islands with "strong" force tomorrow morning, fear of new disasters due to fierce winds and heavy rain

2025/10/12 13:08

Typhoon No. 22 approached on the 9th of this month, causing record-breaking heavy rain, strong winds, and high waves.
A typhoon is approaching the Izu Islands once again.

With the repeated attacks of typhoons, the risk of disasters is increasing.
Especially on the 13th (Monday, a public holiday) when the typhoon approaches,
If you live in the Izu Islands, please refrain from going out unless necessary,
and be extremely cautious of the storm by staying away from windows when indoors.



Typhoon No. 23 was located south of Cape Muroto at noon today, Sunday, the 12th, and is moving northeast at 25km/hr.

The atmospheric pressure at the center is 980hPa, the maximum wind speed near the center is 30m/s,
the maximum instantaneous wind speed is 45m/s, and within a 75km radius from the center, the
wind speed is 25m/s or more.

Also, a front is extending from the south of Shikoku to the Izu Islands.
Atmospheric conditions in the Izu Islands are extremely unstable due to the influence of warm, humid air flowing toward the front.

The typhoon is expected to further develop after this and move east-northeast across the south of Japan,
with a strong wind field.

It is expected to become a "strong" force and approach the Izu Islands from dawn to noon on the 13th (Monday, holiday) tomorrow.

As the typhoon approaches, there will be strong winds in the Izu Islands from early morning to early morning on the 13th (Monday, holiday),
with the risk of some utility poles collapsing and
buildings being scattered over a wide area
.


[Wind forecast] Maximum wind speed (maximum instantaneous wind speed)
Today the 12th (Sunday)
Izu Islands 20 meters (30 meters)
Tomorrow the 13th (Monday/holiday)
Izu Islands: 35 meters (50 meters)


In the Izu Islands, there will be large and violent storms with
swells from early morning until evening on the 13th (Monday, holiday).

[Wave forecast]
Today the 12th (Sunday)
Izu Islands 5 meters with swells
Tomorrow the 13th (Monday/holiday)
Izu Islands 9 meters In addition, in the Izu Islands, there will be some places in the Izu Islands where there will be heavy rain or very heavy rain with thunder from late tonight until early afternoon on the 13th.

If the rain clouds develop more than expected or if the developed rain clouds continue to cover the area, the area where the warning is issued may expand.


[Rain forecast (for places with a lot of rain)]
The predicted hourly precipitation for today, the 12th (Sunday) is
Izu Islands 30mm
The predicted hourly precipitation for tomorrow the 13th (Monday/holiday) is
Izu Islands 70mm

Today 1 The 24-hour precipitation from noon on the 2nd (Sunday) to noon on the 13th (Monday/holiday) is
Izu Islands 200mm

24-hour precipitation from noon on the 13th (Monday/holiday) tomorrow to noon on the 14th (Tuesday) is
Izu Islands 50mm

.

In the Izu Islands, please be extremely cautious of strong winds, high waves with swells, landslides, flooding of low-lying areas, and rising and flooding rivers.

Please refrain from going out for non-essential reasons on the 13th (Monday/holiday) tomorrow,
take strict precautions against strong winds by staying away from windows when indoors, and
be careful of salt damage.

Also, be careful of strong gusts of wind such as lightning and tornadoes.

[Typhoon No. 23] Tomorrow, the 13th, the Izu Islands will experience strong rain and wind, and severe storms. Strict vigilance against heavy rain disasters, strong winds, high waves, etc.

2025/10/12 08:07

As of 6 a.m. today, the 12th, Typhoon No. 23 is moving northeast off the coast of Shikoku.

#Typhoon No.23 12th (Sunday) 6:00 am
===================
Center position Off the coast of Shikoku
Movement speed Northeast 20km/h
Central pressure 992 hPa
Maximum wind speed 25 m/s (near the center)
Maximum instantaneous wind speed 35 m/s
=================



Typhoon No. 23 is expected to advance east-northeast across the south of Japan as it continues to intensify, and will approach the Izu Islands from dawn to morning on the 13th. The central pressure of the typhoon at 6 a.m. tomorrow, the 13th, is expected to reach 980 hPa, the maximum wind speed near the center is 30 m/s, and the maximum instantaneous wind speed is expected to reach 45 m/s. Although it may not be as strong as Typhoon No. 22, which passed through the Izu Islands the other day, there is a risk of strong winds blowing that could overturn moving trucks.
Additionally, waves are expected to reach a height of 9 meters tomorrow, the 13th, and there is a risk of severe swells accompanied by swells.



In the Izu Islands, there will be places where heavy rain accompanied by thunder or very heavy rain will fall from late tonight until early afternoon on the 13th tomorrow. Due to the impact of the recent Typhoon No. 22, the ground has become loose in some areas, making the risk of landslides more likely.

In the Izu Islands, please take strict precautions against heavy rain disasters such as landslides, strong winds, and high waves until the 13th. There is a risk that the damage to buildings that were damaged by Typhoon No. 22 the other day may be further exacerbated, so please stay in a safe place and refrain from going out unless necessary.

Today's weather on the 12th (Sunday): Northern Japan and Hokuriku are prone to rain; western Japan is experiencing a severe late summer heat.

2025/10/12 07:22

Today, the 12th (Sunday), near Honshu, a frontal low pressure system is moving east-northeast east of Kanto, and another frontal low pressure system extending from central China to the Sea of Japan is moving eastward across the Sea of Japan. In the south of Japan, Typhoon No. 23 is intensifying as it moves eastward, and as it continues to intensify, it will approach the Izu Islands through tomorrow the 13th.

It will be a rainy day from northern Japan to Hokuriku due to the effects of low pressure and fronts moving through the Sea of Japan. Particularly in the Tohoku region, there is a risk that the rain will become stronger, accompanied by thunder, and the amount of rain will increase, especially on the Sea of Japan side of the southern Tohoku region. Please be careful of landslides and flooding of low-lying areas tonight.

From Kanto to the west, the sky will be cloudy and there will be some localized showers. In the coastal areas of western Japan, there are likely to be areas where there will be heavy rain accompanied by localized thunderstorms, such as the Kii Peninsula and Shikoku. Please bring an umbrella with you when you go out. In the Kanto region, the chilly weather will disappear as the cold wind from the north subsides, and the maximum daytime temperature in many places will be nearly 5 degrees Celsius higher than yesterday.
Western Japan has a severe lingering summer heat, and there are likely to be midsummer days with temperatures above 30c. Please take care of your physical condition to avoid heat stroke.



In the Izu Islands, warm and humid air from the typhoon will flow toward the front, so the weather will likely be rainy on and off. Typhoon No. 23 is approaching from the west and is expected to approach the Izu Islands in the early morning hours of tomorrow, the 13th. From tonight until the morning of tomorrow, the 13th, there is a risk of extremely heavy rain accompanied by thunder and strong winds, leading to severe stormy weather. The ground is loose in some places due to the recent Typhoon No. 22, and strict vigilance is required to prevent landslides and flooding of low-lying areas.
In addition, there is a risk of strong winds that could overturn trucks into the 13th. Please be extremely cautious of strong winds and high waves, and refrain from going out unless necessary.

Typhoon No. 23 is approaching southern Kyushu. On the last day of the 3-day holiday, people in the Izu Islands are advised to refrain from going out unless necessary and on high alert due to fierce winds.

2025/10/11 12:36

Typhoon No. 23 will mainly affect Okinawa, southern Kyushu/Amami region, and Izu Islands during this three-day weekend.
The Izu Islands experienced record heavy rain and strong winds due to Typhoon No. 22, and there is a risk that stormy weather will return.
The Kanto region is not expected to be affected by the rain clouds of the typhoon itself, but there will be some places along the coast where the rain and wind will be strong.



Today, Saturday, the 11th, Typhoon No. 23 was mostly stationary south of Amami Oshima, but as of 9 a.m., it had begun to slowly move north-northeast.
A strong wind advisory has been issued not only in the Amami region, which is in the strong wind region, but also in southern Kyushu.
Rain clouds are gathering around the center of the typhoon, and thunderclouds are developing on the southwest side of the typhoon.
Also, winds blowing from the south between Typhoon No. 23 and high pressure bring in moist air, and there are places on the southern coast of Honshu where the winds from the south and winds from the east collide, and it is raining in some places.

Typhoon No. 23 is expected to move south of Amami Oshima from the north.
The sea surface east of Tanegashima and Kyushu, which is in the path of the typhoon, has high sea surface temperatures, creating an environment suitable for the typhoon's development, and it is likely to become even more powerful.
As the typhoon moves near the center of the forecast circle, it is expected to approach Kagoshima Prefecture (excluding the Amami region) from late at night today, the 11th (Saturday) to early morning on the 12th (Sunday) tomorrow.
Then, it will move east-northeast off the coast of Tokaido from the south of Japan, and by the 13th (Monday) the next day, there is a risk that it will come very close to the Izu Islands, accompanied by strong winds, similar to Typhoon No. 22.



#Southern Kyushu/Amami - Heavy rain like an overturned bucket
In the southern Kyushu/Amami region, the atmospheric conditions will be extremely unstable as warm, humid air from the typhoon flows in.
Towards the evening of today, the 11th (Saturday), heavy rain of up to 30mm per hour, accompanied by thunder, will fall in some places, and depending on the typhoon's path and degree of development, heavy rain warnings may be issued.
Rainfall is predicted to be 80mm in the 24 hours until noon tomorrow, the 12th (Sunday), in some places.
Cumulonimbus clouds will develop locally in southern Kyushu until dawn on Sunday, the 12th, and in the Amami region until noon on Sunday, the 12th, and there is a risk of thunderstorms, tornadoes, and other violent gusts.



#Southern Kyushu/Amami - Very strong winds into the evening
In the Amami region, there are some places in the strong wind area, and there will be very strong winds in the evening today, the 11th (Saturday).
It is expected that strong winds will enter areas in southern Kyushu from today, the 11th (Saturday).
The maximum instantaneous wind speed expected today, the 11th (Saturday), is 35 m/s in the Amami region and 30 m/s in Kagoshima Prefecture (excluding the Amami region), and tomorrow, the 12th (Sunday), is expected to be 25 m/s in the Amami region, and 30 m/s in Kagoshima (excluding the Amami region).

#Southern Kyushu/Amami - Barges with swells
There will be barges with swells in the coastal waters of the Amami region until early evening today, the 11th (Saturday), and in the coastal waters of southern Kyushu, from the afternoon of today, the 11th (Saturday) until dawn on the 12th (Sunday) tomorrow.
The expected wave height for today, the 11th (Saturday) is 5m in the Amami region and 4m in Kagoshima Prefecture (excluding the Amami region), and the expected wave height for tomorrow, the 12th (Sunday) is 3m in the Amami region, and 4m in Kagoshima Prefecture (excluding the Amami region).



#Izu Islands - Please refrain from going out unless necessary on the 13th (Monday).
From tomorrow the 12th (Sunday) to the 13th (Monday), the area is expected to be affected by rain clouds surrounding Typhoon No. 23 and the typhoon itself.
The day after tomorrow, the 13th (Monday), there will be strong winds that could cause injuries from flying objects or overturning moving trucks.
Please refrain from going out unless necessary and be extremely cautious of strong winds, such as staying away from windows when indoors.

Typhoon No. 23 approaches Amami today. Be careful of heavy rain disasters. It is likely to approach the Izu Islands again around the 13th.

2025/10/11 07:11

As of 6:00 a.m. today, Saturday, the 11th, Typhoon No. 23 is located approximately 180 km south-southeast of Amami Oshima, and is mostly stationary with strong winds.

#Typhoon No. 23 11th (Sat) 6:00
==================
Center location Approximately 180km
South-southeast of Amami Oshima Travel Almost stagnant
Central pressure 994 hPa
Maximum wind speed 23 m/s (near the center)
Maximum instantaneous wind speed 35 m/s
==================



As of 6 o'clock, the Amami region is in a strong wind region, and the northerly wind is increasing.
Today, the 11th (Saturday), Typhoon No. 23 is expected to move northward and approach the Amami region in the afternoon. After that, the typhoon will change its course to the northeast and will approach Kagoshima Prefecture (excluding the Amami region) by late evening.



In the Amami region, active rain clouds surrounding the typhoon will gather, and heavy rain of more than 30 mm per hour may fall, leading to warning-level heavy rain. There is a risk of heavy rain in Kagoshima Prefecture, so please be careful of landslides, flooding of low-lying areas, and rising river waters.
Also, the wind is strong and the ship is expected to be barged at sea. You also need to be careful of strong winds and high waves accompanied by swells.


From now on, Typhoon No. 23 will continue to intensify and move off the coast of the Tokai Sea from the south of Japan until the 12th (Sunday) tomorrow, and around the 13th (Monday), it will take a similar course to Typhoon No. 22, accompanied by strong winds, and there is a risk that it will approach the Izu Islands considerably. Atmospheric conditions are expected to be unstable in the Izu Islands even before the typhoon approaches, and in the southern part of the Izu Islands, there are places where the ground is loose due to the record-breaking heavy rains of Typhoon No. 22, so caution and vigilance against heavy rain is necessary even before the typhoon approaches.

Also, there will be strong winds in the Izu Islands on the 13th (Monday) where there is a risk of injury from flying objects and overturning of moving trucks. It is necessary to refrain from going out unless necessary and to take strict precautions against strong winds, such as staying away from windows when indoors.
From tomorrow the 12th (Sunday) to the 13th (Monday) the day after, please be wary of high waves with swells, landslides, flooding of low-lying land, and rising and flooding rivers. Also, please take precautions against landslides from the evening of today, Saturday the 11th, before the typhoon approaches.

#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected today, the 11th (Saturday)
Southern Kyushu/Amami region 23m/s (35m/s)
Okinawa region 18m/s (30m/s)
+Maximum wind speed (maximum instantaneous wind speed) expected for tomorrow 12th (Sunday)
Izu Islands 25m/ s (35m/s)
Southern Kyushu/Amami region 18m/s (30m/s)
+Maximum wind speed (maximum instantaneous wind speed) expected for tomorrow, the 13th (Monday)
Izu Islands 30m/s (45m/s)

#Expected wave height (with swell)
+Expected wave height today, the 11th (Saturday)
South Kyushu Department/Amami region 5m
Okinawa region 4m
/Expected wave height for tomorrow 12th (Sunday)
Izu Islands 6m
South Kyushu - Amami region 4m
- Expected wave height on Monday the 13th tomorrow
Izu Islands 7m

# Expected amount of rain (in places with a lot of it)
+Precipitation expected for 24 hours by dawn on the 12th (Sunday)
Izu Islands 100mm
Southern Kyushu/Amami region 80mm
+The next day 1 Precipitation expected for 24 hours by dawn on the 3rd (Monday)
Izu Islands 200mm


There is a risk that the typhoon will approach again as damage remains. Please take early typhoon measures.

Today's weather on the 11th (Saturday): Umbrellas are in use from Tohoku to eastern Japan; warning of increasing rain and wind in the Nansei Islands

2025/10/11 06:23

Today, the 11th (Saturday), Typhoon No. 23 is expected to move northward and approach the Amami region. In the Nansei Islands, you need to be careful about the increasing rain and wind. It's also likely to be a rainy day from Tohoku to eastern Japan, making umbrellas useful.



Typhoon No. 23 is expected to approach Okinawa/Amami. The rain and wind will gradually become stronger, and there is a risk of warning-level heavy rain in Amami. Please be careful of landslides, flooding of low-lying areas, rising river waters, and high waves accompanied by strong winds and swells.

The typhoon is expected to move further north and approach southern Kyushu from late evening. Caution is required as there are places with heavy rain and thunderstorms, especially in Kagoshima Prefecture.

Western Japan's Sea of Japan side will be clear and sunny.As southerly winds from the typhoon flow in, the temperature will rise, with the maximum temperature likely to reach nearly 35c in some places. Please take precautions against heat stroke, such as staying hydrated frequently.

It will be a rainy day in eastern Japan and Tohoku. Unfortunately, it looks like the weather will be bad for going out. Please bring rain gear when going out. Because the wind blows from the north, temperatures will not rise in the Kanto and southern Tohoku regions on the Pacific coast, making it feel chilly. Please be careful when choosing your clothes.

It looks like Hokkaido will be sunny and the weather will be fine for going out. Please be aware of the temperature difference between morning and evening and during the day.

[Typhoon No. 23] Kinki and Kanto areas are in the storm warning area Typhoon + front = heavy rain even before it approaches, affecting outings during the holidays

2025/10/10 12:06

As of 9 a.m. today, October 10th (Friday),
Typhoon No. 23 (Nakuri) is located approximately 190 km northeast of Minami Daito Island and is moving north-northwest at a speed of 20 km/hr.

The central pressure is 1004hPa, the maximum wind speed near the center is 18m/s,
the maximum instantaneous wind speed is 25m/s.



From now on, it will progress northward while developing on the warm sea surface, and
is expected to approach the Amami region tomorrow, Saturday the 11th, the first day of the long weekend.

After that, it will change its course to the east, and from the 12th (Sunday) to the 13th (Monday/holiday) it will move eastward through the south of Japan.

Shikoku, Kinki, Tokai, and Kanto on the Pacific side are also expected to be placed in a "storm warning area" where strong winds may blow.



The characteristic of this typhoon is that the moist air around the typhoon flows towards the front that is stationary near
Honshu, so the rain intensifies even before the
typhoon approaches.



Looking at the rain and wind forecast for noon on Saturday the 11th,
the center of the typhoon will be northeast of Amami, but
rain clouds will also be covering faraway places like Nagoya, Tokyo, and Sendai.

This typhoon is not as strong as Typhoon No. 22, for which a special warning of strong winds and heavy rain was issued for Hachijojima.
The storm is likely to be limited to the area near the center of the typhoon.

However, near the front, the winds collide with each other, so
the wind may become a little stronger.

Even if the typhoon is far away, you need to be careful of the increasing rain and wind.



During the three-day holiday, there will be many places across the country with unstable weather due to typhoons and fronts.

On the 12th (Sunday), heavy rain will occur in southern Kyushu and the Amami region,
requiring vigilance for landslides.

In addition, the moist air around the typhoon will flow towards the front that is stationary in the Sea of Japan,
and the front will become more active.

There is a risk of warning-level heavy rain even in Niigata and other areas along the Sea of Japan.

From the 12th (Sunday) to the 13th (Monday, public holiday), the last day of the long weekend,
Typhoon No.23 may approach the Izu Islands, which was damaged by Typhoon No.22, again.

It seems that there will once again be places in the Izu Islands where there will be strong winds that could cause injuries from flying objects and
running trucks that may overturn.

In the Izu Islands, please refrain from going out unless necessary,
, and be extremely cautious of strong winds by staying away from windows when indoors.

In addition, there is a possibility that the typhoon will develop further in the future, or that its speed may change.

The Pacific coast of western and eastern Japan is now in the storm warning zone, and transportation is likely to be affected in some places during the three-day holiday.

Please continue to check the latest typhoon information and traffic information.

Next up is Typhoon No. 23, 3-day weekend, severe storms in Okinawa and Amami, fear of severe storms and warning-level heavy rain on the Pacific side of western and eastern Japan.

2025/10/09 12:49

Typhoon No. 23 is approaching Japan, following Typhoon No. 22.
Typhoon No. 23 will affect Okinawa and the Pacific side of western and eastern Japan over the three-day weekend this weekend.
Currently, the southern part of the Izu Islands is experiencing record heavy rain and strong winds due to Typhoon No. 22, and there is a risk of stormy weather again.



As of today, the 9th (Thursday), Typhoon No. 23 is moving north-northwest in the south of Japan.
It is expected to move northwest through the south of Japan and approach the Daitojima region and Okinawa main island region from tomorrow the 10th (Friday) to the 11th (Saturday) the day after.
Then, it will change its course to the northeast and approach the southern Kyushu/Amami region from the 11th (Saturday) to the 12th (Sunday) the next day.
Then, from the 12th (Sunday) to the 14th (Tuesday), it is expected to move eastward across southern Honshu.
The forecast circle is still large, but it will approach the Izu Islands from the 13th (Monday) to the 14th (Tuesday).
In Okinawa and the Pacific side of western and eastern Japan, please be careful of strong winds, high waves with swells, storm surge, and violent gusts such as lightning strikes and tornadoes.
Depending on the course of the typhoon and the extent of its development, there is a risk that the Amami region could experience warning-level heavy rain, strong winds, and storm surge, resulting in severe storms, and in the Pacific side of western and eastern Japan, there is a risk of severe or warning-level heavy rain.



#Daito Island/Okinawa main island region Waves are high from today and winds will be strong tomorrow
Wave height expected today on the 9th (Thursday)
Daitojima region 3m with swells
Wave height expected tomorrow 10th (Friday)
Okinawa main island region 4m with swells
Daitojima region 5m With swells
Wave height expected on Saturday the 11th tomorrow
Okinawa main island region 5m with swells
Daitojima region 4m with swells

Wind direction and maximum instantaneous wind speed expected for tomorrow 10th (Friday)
Okinawa main island region North West wind 25m/s
Daitojima region Northwest and then southwest wind 30m/s
expected tomorrow, Saturday the 11th Wind direction/maximum wind speed (maximum instantaneous wind speed)
Okinawa main island region northwest wind 30m/s
Daitojima region south wind 30m/s

#Southern Kyushu/Amami region: The rain and wind will become stronger from the next day
Precipitation forecast for the next 24 hours until noon on the 11th (Saturday) (in areas with the most)
Amami region: 100mm
After that, the rainfall is expected to increase further.

Maximum instantaneous wind speed expected on tomorrow 10th (Friday)
Amami region 25m/s
Maximum instantaneous wind speed expected on tomorrow 11th (Saturday)
Amami region 30m/s

Wave height expected for tomorrow 10th (Friday)
Amami region 4m with swells
Wave height expected for tomorrow 11th (Saturday)
Amami region 5m with swells

Significantly higher temperature than normal; Okinawa records extremely hot days in October (weather summary September 28, 2025 - October 4, 2025)

2025/10/09 11:15

#Summary of the weather for this period (September 28th to October 4th)
The average temperature was easily covered by warm air heading towards low pressure and fronts throughout the period. Even in October, there were many places that recorded midsummer days, and there was a trend towards high temperatures nationwide. In northern Japan, eastern Japan, Kyushu, Okinawa and Amami, there were many places that were more than 2 degrees Celsius higher than normal, and in some places in Hokkaido, the temperature was more than 4 degrees Celsius above normal.

Precipitation was above normal in areas from western Japan to eastern Japan on the Sea of Japan side, which were susceptible to the effects of low pressure and fronts, and in Niigata, Matsue, and Fukuoka, precipitation was more than double normal. On the other hand, Hokkaido, the Pacific coast of eastern and western Japan, Okinawa and Amami, experienced a tendency for less rainfall, and Hokkaido in particular experienced a tendency for considerably less rainfall.

Sunshine hours tended to be higher mainly in northern Japan, Okinawa, and Amami, which were prone to being covered by high pressure. From eastern to western Japan, temperatures were at or below normal in many places, as they were susceptible to the effects of low pressure systems and autumn rain fronts, resulting in more cloudy and rainy days.



#Characteristics of pressure distribution
On the 28th, a low pressure system accompanied by a front moved eastward through the Sea of Japan from near the Korean Peninsula. A front passed through western Japan. On the 29th, a developing low-pressure system passed near Tohoku and headed east of Japan. A front extending from a low pressure system remained in the south of Japan until the 30th. On the 30th, the area around Honshu was widely covered by high pressure. Late in the evening, two low pressure systems formed near the Izu Islands and in the East China Sea. On the 1st, a low pressure system moving over the Izu Islands continued to develop and moved eastward east of Japan, accompanied by a front late at night. The low pressure area near the East China Sea became indistinct by night. A tropical cyclone has formed over the east coast of the Philippines. On the 2nd, a front extending from a low pressure system east of Japan stalled south of Honshu. Typhoon No. 21 occurred off the east coast of the Philippines. On the 3rd, the area around Honshu was widely covered by a mobile anticyclone. A front extending from a low-pressure system in the East China Sea is moving eastward over western Japan. On the 4th, an autumn rain front extended from the East China Sea to the southern coast of Honshu, and a low pressure system above the front moved eastward through the Sea of Japan. In the south of Japan, the low pressure area became a tropical cyclone and gradually approached the Ogasawara Islands.

#Precipitation
On the 28th, due to increased frontal activity, extremely heavy rain was observed in Akune City, Kagoshima Prefecture, which was close to the front, with an hourly rainfall of 52.5mm. On the 29th, rain fell mainly from western Japan to northern Japan on the Sea of Japan side due to the effects of a low pressure system and front. Extremely heavy rain was observed in Mitsui, Wajima City, Ishikawa Prefecture, with an hourly rainfall of 73.5 mm. On the 30th, heavy rain occurred in the Izu Islands near the front. Rain clouds developed locally in Hokuriku, Kinki, and Tokai regions, causing rain. On the 1st, atmospheric conditions became unstable in northern and eastern Japan due to a low pressure trough accompanied by cold air in the upper atmosphere. Torrential rain was recorded in Morino, Shiraoi-cho, Iburi region, Hokkaido, with an hourly rainfall of 124 mm. On the 2nd, atmospheric conditions became unstable in northern and eastern Japan due to the influence of cold air in the sky, and rain and thunderclouds developed. Heavy rain was observed in Matsuhama, Niigata City, Niigata Prefecture, and Imabetsu Town, Aomori Prefecture. On the 3rd, due to the effects of a low pressure system and front moving through the East China Sea, it rained mainly in western Japan, with 73.0 mm of rainfall per hour observed in Izuhara, Nagasaki Prefecture. On the 4th, it rained in western and eastern Japan due to the influence of the autumn rain front, and heavy rain of 84.5 mm per hour was observed in Kurume City, Fukuoka Prefecture.

#Temperature
On the 28th, temperatures rose on the Pacific side due to the influence of warm air heading towards the front. The temperature was observed at 31.0c in Nagoya and 30.6c in Osaka on a midsummer day. On the 29th, temperatures rose in the area south of the front from Kanto to the west. In the Kanto region, temperatures are on the verge of becoming extremely hot, with temperatures rising to 34.5 degrees Celsius in Sano City, Tochigi Prefecture, and 34.4 degrees Celsius in Kumagaya City, Saitama Prefecture. On the 30th, the warm air in the sky receded and the temperature rise slowed down, but the lingering heat was severe in the Okinawa area, with a temperature of 33.4 C observed on Kurume Island. On the 1st, temperatures in northern and eastern Japan were slow to rise due to rain, and the highest temperature in central Tokyo was 23.6 degrees Celsius, marking the first time in 112 days that it was not a summer day. On the other hand, in Okinawa, there were many points that updated the number one value in October. On the 2nd, it was a very hot day of 35.0c on Miyagi Island, Okinawa Prefecture. This is the first extremely hot day of the year in Okinawa, and the first time since records began to record an extremely hot day in October. On the 3rd, it was unseasonably warm in Hokkaido and Okinawa. The temperature was recorded at 28.2c in Sapporo and 34.2c in Naha. On the 4th, the high temperature trend continued in Hokkaido and Okinawa, with Iriomote Island recording a temperature of 34.0c, breaking the record for October.