Typhoon No. 27 to weaken into an extratropical cyclone the day after tomorrow (the 7th); watch out for another typhoon ahead.

2026/10/05 19:05

As of 3:00 PM today, Monday the 5th, Typhoon No. 27?a large and very strong storm?is moving northward in the waters near the Ogasawara Islands. Rough seas currently prevail in the vicinity of the Ogasawara Islands, and caution regarding high waves is required through the morning of tomorrow, Tuesday the 6th. Meanwhile, seas around the Izu Islands are expected to become increasingly rough as the typhoon moves north; waves reaching up to 6 meters are forecast starting tomorrow afternoon. Please exercise sufficient caution regarding high waves.
Typhoon No. 27 is expected to maintain its strength while moving northeast?away from Japan?on Wednesday the 7th, eventually transforming into an extratropical cyclone by the evening. Caution and vigilance regarding strong winds and high waves are necessary along the Pacific coast of northern and western Japan through Wednesday.



Additionally, Typhoons No. 28 and No. 29 formed today, Monday the 5th.



As of 3:00 PM today, Monday the 5th, Typhoon No. 28 is located near the Midway Islands and is moving westward with very strong intensity. This typhoon originated from a tropical depression that formed off the coast of Mexico on Monday, September 14th (Japan time) and has traveled into Japan's monitoring region over the course of more than 20 days.


Satellite imagery reveals a distinct eye, surrounded by a dense ring of cumulonimbus clouds. Typhoon No. 28 is expected to continue moving westward; depending on its path, it could impact areas such as the Ogasawara Islands.



Meanwhile, as of 3:00 PM on the 5th (Monday), Typhoon No. 29 is located near the Marshall Islands and is moving north-northwest. While satellite imagery does not show a clearly defined structure, a concentration of cumulonimbus clouds is visible. Typhoon No. 29 is expected to shift its course toward the west and could approach the Ogasawara Islands with considerable strength.



Please continue to monitor the latest information regarding both Typhoon No. 28 and Typhoon No. 29.

Rain to spread across much of Honshu on the 5th (Mon.); rainfall expected to intensify in Shikoku; weather set to improve tomorrow.

2026/10/05 12:03

A low-pressure system over the Sea of ??Japan is moving northeast.
Typhoon No. 27, a large and very strong storm, is moving north-northwest near the Ogasawara Islands. A high-wave warning has been issued for the area, and caution regarding strong winds is also advised through tonight. The typhoon is expected to move over the waters east of Japan, causing wave heights to rise near Honshu between the 6th and 7th.
A high-pressure system east of the Kuril Islands is moving eastward, while a high-pressure system over the Asian continent is slowly moving southeastward.
The area around Honshu is situated in a pressure trough between these two high-pressure systems,
and is widely covered by clouds due to the influence of moist air.
Rain is currently falling in various locations, primarily from the Hokuriku region to Shikoku.



A small low-pressure system has formed near Shikoku, bringing active rain clouds and causing moderately heavy rain.
Rainfall is expected to intensify near Shikoku through this evening.



You will likely need a large umbrella throughout the day.



This small low-pressure system will dissipate by tonight,
and the weather is expected to gradually improve from the west tomorrow, the 6th (Monday).

While rain will linger in northern Japan,
sunshine is expected to return across a wide area stretching from eastern to western Japan.

[Breaking] Typhoons No. 28 and 29 Form: Rare Triple Typhoon Event

2026/10/05 11:01

Hurricane Nolo, located near the Midway Islands, crossed the 180th meridian and developed into Typhoon No. 28 (Nolo) at 10:05 AM today, Monday the 5th.
This is a rare "cross-basin" typhoon?an event occurring only once every few years?and it already possessed "very strong" intensity at the time of its designation.
Typhoon No. 28 is expected to continue moving westward while maintaining its "very strong" intensity.

Additionally, a tropical depression near the Marshall Islands developed into Typhoon No. 29 (Koguma) at 10:15 AM today, Monday the 5th.
Typhoon No. 29 is expected to move northwestward, intensify to "strong" status by the 9th, and approach the Ogasawara Islands.



With Typhoon No. 27 also currently located near the Ogasawara Islands, an unusual "triple typhoon" situation has emerged.
Predicting the paths of multiple typhoons in close proximity is extremely difficult and involves high uncertainty; therefore, the possibility that any of them could approach Japan cannot be ruled out. Please stay tuned for further typhoon updates.

New Typhoon Forecast to Form Within 24 Hours: Will Hurricane "NOLO" become a Rare "Cross-Basin Typhoon"?

2026/10/05 07:41

A tropical depression is currently located in the waters far southeast of Japan, near the Marshall Islands, and is moving east-northeast. There is a possibility that this tropical depression will develop into a typhoon within the next 24 hours.



This tropical depression is expected to intensify into a typhoon near the Marshall Islands by 3:00 AM tomorrow. Afterward, it is projected to take a westward path and reach "strong" intensity around the 9th.
While the forecast track keeps it well away from Japan, depending on future predictions, it could approach the Ogasawara Islands, potentially bringing gale-force winds and high waves. Please stay tuned for further updates.

Additionally, Hurricane "Nolo" is forecast to move westward from waters near Hawaii.

This hurricane originated as a tropical depression that formed in the eastern Pacific Ocean off the coast of Mexico on September 14 (Japan Standard Time). It has moved westward while fluctuating in intensity?strengthening and weakening?and is currently poised to cross the 180th meridian as a hurricane.



Agencies responsible for monitoring tropical cyclones are designated by region under the World Meteorological Organization (WMO). The Japan Meteorological Agency (JMA) classifies a tropical cyclone as a "typhoon" if it is located in the Northern Hemisphere between 100E and 180E longitude and has a maximum sustained wind speed near its center of 17.2 m/s or greater. In the Northern Hemisphere, these storms are referred to as "cyclones" in regions west of 100E East longitude and as "hurricanes" in regions east of 180E East longitude.

There is a possibility that Hurricane "NOLO" will cross 180E East longitude, enter the area monitored by the Japan Meteorological Agency, and be reclassified as a "typhoon."
Such "cross-basin typhoons" are rare occurrences, happening roughly once every few years; recent examples include Typhoon No. 8 in 2023 and Typhoon No. 17 in 2018.



The forecast path for Hurricane "NOLO" after it enters the Japan Meteorological Agency's monitoring zone involves significant uncertainty, and the possibility of it approaching Japan cannot be ruled out. Please stay tuned for further typhoon updates.

Weather forecast for today, Monday the 5th: Rain likely in many areas; large, very strong Typhoon No. 27 is moving northward near the Ogasawara Islands.

2026/10/05 06:25

Today, Monday the 5th, humid air will cause clouds to spread across the region near Honshu, leading to a high likelihood of rain in many areas. Near Shikoku, a localized front?not depicted on standard weather maps?is present, bringing developed rain clouds over the area.

Meanwhile, Typhoon No. 27?a large and very strong storm?is moving northward over the waters east of the Ogasawara Islands. Residents of the Ogasawara Islands should remain alert for high waves accompanied by swells and be cautious of strong winds through tomorrow. Please also watch out for localized heavy rainfall.

High wave conditions will persist along the Pacific coast from Northern to Western Japan through around tomorrow, the 6th. Rough seas are expected along the coasts of the Kanto region, including Ibaraki and Chiba prefectures; please exercise caution regarding high waves, swells, and strong winds.

Today, humid air will bring widespread cloud cover to the area near Honshu, resulting in unsettled weather with a high chance of rain across Western and Eastern Japan. Even if it is not raining when you head out, it is advisable to carry an umbrella. In Shikoku, particularly in Kochi Prefecture, there is a possibility of heavy rain accompanied by thunder, so please stay alert to changing rainfall conditions.

In Northern Japan, rain is expected to gradually set in from the afternoon due to a front extending from a low-pressure system moving across the Sea of ??Japan. Hokkaido lies in the path of the low-pressure system's developed rain clouds, so rainfall may intensify late at night; please be wary of lightning strikes and sudden gusts of wind.

During the day, temperatures in most areas will be close to seasonal averages. However, it may feel somewhat chilly in places where it is raining, so it would be wise to have a jacket or similar outer layer to adjust your body temperature as needed.
In Kyushu, temperatures may rise enough to make you sweat in areas where the sun breaks through.

Weather for Tomorrow, Monday the 5th: Generally Unsettled Skies; Conditions Deteriorating in Northern Japan

2026/10/04 17:56

Tomorrow, Monday the 5th?the start of the work week?a low-pressure system is expected to intensify as it moves eastward across the Sea of ??Japan. A front extending from this system will advance toward Northern Japan. Expect unsettled weather over a wide area, making an umbrella essential for the day.



In Northern Japan, there will be periods of sunshine during the day, but rain will begin to fall in the afternoon, starting from the Sea of ??Japan side. Even if it isn't raining when you head out, it is a good idea to carry rain gear. On the Sea of ??Japan side of Hokkaido, the rain will intensify late at night, so returning home early is advisable. Daytime highs will generally be around 20C. However, mornings will be chilly?with temperatures dropping below 10C in some areas?so be mindful of the significant temperature difference between the morning/evening and midday.

Eastern Japan will see mostly cloudy skies. There is a chance of passing showers, so it is wise to carry a folding umbrella when going out. In the Kanto region, northerly winds during the day will cause temperatures to be slightly lower than today, creating a somewhat chilly feel.
In the Ogasawara Islands, Typhoon No. 27 is approaching; please exercise caution and stay alert for strong winds and high waves.

In Western Japan?spanning the Kinki, Chugoku, and Shikoku regions?humid air will make rain likely; please bring rain gear when heading out.
In Kyushu, skies will be cloudy at first but will gradually clear up.
In areas where it rains, temperatures will not rise significantly, hovering around a comfortable 25C. In Kyushu, where skies will clear, temperatures are expected to reach around 30C, particularly in the south; please take precautions against heatstroke.

[Weekly Weather Forecast] Rain is expected in many areas at the start of the week due to a front and typhoon. Sunny weather is expected from the middle to the end of the week.

2026/10/04 16:19

Looking ahead, the prolonged rainfall caused by typhoons and the autumn rain front will come to an end. We can expect weather typical of October, characterized by a cycle of changing conditions as migratory high-pressure systems and low-pressure systems alternately pass over Honshu.
While many areas across the country will see rain early in the week, conditions are expected to improve thereafter, bringing clear autumn skies to more regions.




Currently, moist air and a trough of low pressure are bringing rain to a wide area of ??Western Japan; this rainy weather is expected to persist until around the 5th (Monday).

Additionally, a low-pressure system accompanied by a front is forecast to move eastward across the northern Sea of ??Japan from the 5th (Monday) to the 6th (Tuesday), likely bringing stormy weather to Northern Japan. Please be alert for hail, lightning strikes, sudden gusts, and short bursts of heavy rain.



Meanwhile, Typhoon No. 27 is moving northward near the Ogasawara Islands.
From the 5th (Monday) to the 6th (Tuesday), please exercise caution regarding high waves accompanied by swells and strong winds in the vicinity of the Ogasawara Islands.
Current forecasts indicate a low probability of the typhoon making landfall on Honshu; however, waves will gradually rise along the Pacific coast from Northern to Western Japan, leading to rough sea conditions in some areas. Please refrain from approaching the coast, even if the weather appears calm. Depending on the storm's path, winds may strengthen along the coast near the Kanto region around Tuesday the 6th. Please stay tuned for further updates.



From around Wednesday the 7th, a high-pressure system will cover a wide area, leading to generally sunny or cloudy weather across the country.

From Thursday the 8th through Friday the 9th, an influx of cold air aloft will cause temperatures to drop in Northern Japan; morning lows are expected to fall below 10C in some areas. As the temperature difference between morning and midday widens, please take care to manage your health amidst these daily fluctuations.

Sunny weather is expected in many areas from Saturday the 10th through Sunday the 11th, making for favorable conditions for outings during the three-day weekend.

[Typhoon Information] Typhoon No. 27 threatens to approach the Ogasawara Islands with very strong intensity; caution advised regarding high waves along the Pacific coast of Honshu.

2026/10/04 06:17

As of 3:00 a.m. today, Sunday the 4th, Typhoon No. 27 (Choi-wan)-a large and very strong storm-is located in the waters near the Ogasawara Islands. It is moving northeast at approximately 15 km/h, accompanied by a gale-force wind zone. The typhoon has a central pressure of 945 hPa, with maximum sustained winds of 45 m/s and peak gusts of 60 m/s; gale-force winds of 25 m/s or higher are occurring within a 150 km radius of the center.

Typhoon No. 27 is expected to intensify further as it moves northward. It may approach the Ogasawara Islands while maintaining its "very strong" intensity between the evening of tomorrow, Monday the 5th, and early Tuesday the 6th.
Subsequently, it is forecast to move northward off the east coast of Japan and transform into an extratropical cyclone east of the Kuril Islands on Thursday the 8th.

# Typhoon No. 27 Sunday the 4th, 3:00 AM
------------------------------------
Size: Large
Strength: Very strong
Center location: Waters near the Ogasawara Islands
Movement: Northeast at 15 km/h
Central pressure: 945 hPa
Max. wind speed: 45 m/s (near the center)
Max. gust speed: 60 m/s
------------------------------------

Rough seas accompanied by swells are expected in the Ogasawara Islands through Tuesday the 6th; please exercise caution regarding high waves.
Very strong winds are expected from tomorrow, Monday the 5th, through Tuesday the 6th; please be alert and take precautions against strong winds.

Additionally, due to warm, moist air surrounding the typhoon and developed rain clouds associated with the storm itself, heavy rain is likely in some areas from late Monday night (the 5th) through Tuesday the 6th. Depending on the typhoon's path and intensity, there is a possibility of heavy rainfall reaching warning levels. [Wave Forecast: Ogasawara Islands]
Forecast wave height for the 4th (Sun):
6m (with swells)
Forecast wave height for the 5th (Mon):
8m (with swells)
Forecast wave height for the 6th (Tue):
8m (with swells)

[Wind Forecast: Ogasawara Islands]
Forecast maximum wind speed (peak instantaneous wind speed) for the 5th (Mon):
23 m/s (35 m/s)
Forecast maximum wind speed (peak instantaneous wind speed) for the 6th (Tue):
23 m/s (35 m/s)

[Rain Forecast: Ogasawara Islands]
Forecast hourly rainfall for the 5th (Mon) (maximum in some areas):
30 mm
Forecast 24-hour rainfall from 06:00 on the 5th (Mon) to 06:00 on the 6th (Tue) (maximum in some areas):
100 mm
Forecast 24-hour rainfall from 06:00 on the 6th (Tue) to 06:00 on the 7th (Wed) (maximum in some areas):
50 mm




Although the system is currently expected to pass at a distance from Honshu, wave heights will gradually increase along the Pacific coast of Northern and Western Japan, leading to rough sea conditions in some areas. Please refrain from approaching the coast, even if the weather appears calm. Depending on the storm's path, winds may also strengthen along the coast near the Kanto region around Tuesday, the 6th. Please stay tuned for further updates.

Please pay attention to disaster prevention weather information issued in the future.

Why Did the Kanto Region Experience Prolonged Rain in September? Causes and the Outlook for October

2026/10/03 23:05

September saw record-breaking, prolonged rainfall in areas such as Tokyo, with gloomy weather persisting throughout the month. Why did the rain continue for so long? Will this type of weather persist, or can we look forward to crisp, clear autumn days in October?

On October 1, the Japan Meteorological Agency (JMA) released a report titled "Regarding the Record-Breaking Heavy Rainfall and Lack of Sunshine on the Pacific Side of Eastern Japan in September and the Outlook Ahead."

For the Pacific side of Eastern Japan, September saw the highest monthly precipitation and the lowest monthly sunshine duration since record-keeping began in 1946.
This record-breaking weather was caused by the influx of warm, moist air along the periphery of a dominant high-pressure system (merged with the Pacific High) and the eastern edge of a large-scale low-pressure area south of Japan; this fueled intense activity in the autumn rain front, which remained stalled near Honshu.

# Weather Conditions
On the Pacific side of Eastern Japan, monthly precipitation for September reached 236% of the seasonal average?the highest level since regional statistics began in 1946 (surpassing the previous record of 182% set in 1982). Twelve observation sites, primarily in the southern Kanto region, recorded their highest monthly precipitation totals on record.
Additionally, monthly sunshine duration was significantly low, falling to 46% of the seasonal average?the lowest level since 1946 (surpassing the previous record of 54% set in 1988).


# Characteristics of Atmospheric Circulation
The westerlies near Japan were significantly stronger than average, particularly over the waters east of the country, creating conditions conducive to updrafts in the vicinity of Honshu.
In addition, a dominant high-pressure system?merged with the Pacific High?stagnated east of Japan, while an autumn high-pressure system extended from the Asian continent; this resulted in a significant north-south temperature gradient across Honshu.
This pressure pattern persisted throughout the month, with the autumn rain front stalling near Honshu for extended periods. Furthermore, the activity of the autumn rain front intensified greatly due to a continuous influx of warm, moist air from the sea, channeled along the periphery of the Pacific High and the eastern edge of a large-scale low-pressure zone south of Japan.
Typhoon No. 25 also moved northeastward over the waters south of the Kanto region, tracking along the edge of the Pacific High.



# Outlook
While the season for typhoons and autumn rains continues, weather conditions across the country are expected to fluctuate in cycles of a few days throughout October, with more sunny days than average. Consequently, it is unlikely that the current conditions of high precipitation and limited sunshine on the Pacific side of Eastern Japan will persist.

Even in regions like Kanto that have experienced prolonged spells of rain, we can look forward to crisp, clear autumn days in October. However, autumn weather tends to shift in cycles lasting a few days, so there will likely be times when conditions are influenced by low-pressure systems or weather fronts. Additionally, October is a month when typhoons typically still form and may approach or make landfall in Japan. As there is a possibility of localized heavy rainfall, please stay updated with the latest weather information and be prepared for potential heavy rain.

[First time in 77 days] Tokyo set for pleasant weather all weekend; long spell of rain finally takes a break — Weather forecast for today and tomorrow

2026/10/03 13:54

The long stretch of rainy days that began in August is finally coming to an end.
Today, Saturday the 3rd, Tokyo is expected to be sunny as a high-pressure system from the Asian continent moves in. This marks the first sunny Saturday in eight weeks?the last one was August 8th.
If precipitation remains at zero for both Saturday and Sunday, it will be the first weekend suitable for outings in 77 days, since July 18th?19th.



Weather for Today, Saturday the 3rd
A high-pressure system from the continent is covering a large area around Honshu, bringing sunny skies to much of the region.
The Kanto region will also enjoy ideal weather for outings?a welcome change?and Tokyo looks set to break the streak of consecutive days with rainfall that has persisted since August 26th.
In Hokkaido, unsettled weather continues due to a low-pressure system near the Kuril Islands; however, conditions are expected to improve as the continental high-pressure system moves in.



Weather for Tomorrow, Sunday the 4th
The continental high-pressure system will continue to cover the area around Honshu, bringing sunny skies to a wide region.
However, weather conditions are expected to deteriorate across Kyushu, western Shikoku, and the Chugoku region due to a front extending near the Nansei Islands.
Sunny weather will persist in Kanto, and Tokyo is expected to enjoy another day suitable for outings, just like today.

Looking ahead, the influence of a migratory high-pressure system means we can expect more days of crisp, pleasant autumn sunshine across the country.