Rainy season front becomes active; warning-level heavy rain is likely to occur in Okinawa from tomorrow until around the 11th

2026/06/09 17:59

The Baiu front is extending from near Taiwan through the East China Sea to the east of Japan, and the low-pressure system above the front is moving eastward through the East China Sea.
As warm, humid air is flowing toward the low pressure system and front, frontal activity is increasing, and rain clouds are developing near the front.
In Naze, Amami City, Kagoshima Prefecture, heavy rain of 48.0 mm was observed in the hour until 14:49, and as of 18:00, a level 4 landslide danger warning has been announced for Toshima Village, Amami Region, Kagoshima Prefecture.



The front is expected to move south from Konya to tomorrow the 10th, and the low pressure system on the front moving through the East China Sea is expected to pass near the Nansei Islands. In addition, a low pressure system that will change from a tropical cyclone is expected to move toward the Sakishima Islands on the 10th, and pass near Okinawa until the 11th.

As a result, atmospheric conditions are expected to be unstable in the main island of Okinawa and the Sakishima Islands from tomorrow until the 11th. Active rain clouds are likely to form, and heavy rain of more than 30 mm per hour is expected to occur in some places.Depending on the degree of rain cloud development, there is a risk of heavy rain reaching warning level. Please be careful of landslides, flooding of low-lying areas, and rising river waters. Also, be careful of strong wind gusts such as lightning strikes and tornadoes.




#Expected amount of rain (in places where there is a lot)
+Expected 1-hour precipitation amount for today 9th
Okinawa main island region 30mm
Miyakojima region 30mm
Yaeyama region 40mm
+One-hour precipitation expected on tomorrow 10th
Okinawa main island region 40mm
Miyakojima region 30mm
Yaeyama region 40mm
+Precipitation expected for 24 hours by the evening of tomorrow 10th
Okinawa main island region 150mm
Miyakojima region 120mm
Yaeyama region 150 mm
+Precipitation expected for 24 hours by the evening of the 11th the day after tomorrow
Okinawa main island region 120mm
Miyakojima region 80mm
Yaeyama region 80mm

Weather for the week: Be careful of heavy rain due to the rainy season front in Okinawa and Amami; Honshu area is closed during the rainy season mainly in western Japan

2026/06/09 07:32

From now on, the seasonal rain front is expected to stay in the south of Honshu. There will be many days when the area around Honshu will be covered by relatively high pressure.



A low pressure front is expected to pass near the Nansei Islands from tomorrow the 10th (Wednesday) to the 11th (Thursday) the day after. This low pressure system is expected to become a tropical cyclone in the South China Sea by the night of today, the 9th (Tuesday), and turn into a low pressure system moving above the front by the night of the 10th (Wednesday) tomorrow.

There will be places near Okinawa and Amami where very warm and humid air from a tropical cyclone will flow in, forming rain clouds and causing heavy rain accompanied by thunder. Rain will continue from tomorrow until around the 11th (Thursday), and depending on the degree of rain cloud development, there is a risk of heavy rain reaching warning level. Please be careful of landslides, flooding of low-lying areas, and rising and flooding rivers. Around the 12th (Friday), the front will move southward near Okinawa, but after that the rainy season front will become stationary again and rain is expected to continue.

On the other hand, the area around Honshu is likely to be covered by relatively high pressure on many days. There are some sunny days from the Tokai to the west, so it will be a break during the rainy season. The Kanto region is in the rainy season, and there will be temporary rain around the 12th (Friday).
It is expected that many places near Honshu will experience near-normal temperatures from now on. However, it will be a humid and humid experience typical of the rainy season, and some places where the sun can reach are likely to record midsummer days of over 30 degrees Celsius. Please try to prevent heatstroke by staying hydrated frequently and using the air conditioner instead of holding back.

Weather forecast for today, the 9th (Tuesday): Warning of thunderstorms, strong winds, and high waves in Hokkaido; risk of heavy rain in the Nansei Islands

2026/06/09 06:44

Today, the 9th (Tuesday), near Honshu, a low pressure system accompanied by a front is moving near Hokkaido, and a rainy season front is stationary near the Nansei Islands. As of 6 a.m., rain is falling in a wide area around Honshu, from northern Japan to western Japan and the Nansei Islands, and a landslide warning has been issued for Tokachi Village in the Amami region.



Hokkaido will experience rain due to the effects of low pressure, and there are likely to be places in eastern Hokkaido where there will be heavy rain accompanied by thunder. Rain clouds will remain persistent from the afternoon onwards, and there will be some localized thunderstorms. Winds are expected to increase due to the low pressure, so please be careful of strong winds and high waves in coastal areas.

It will rain from Tohoku to Kyushu until around noon, but as the front moves southward to Honshu, the rain will gradually stop in many places. In inland areas of eastern and western Japan, there may be some areas where you can see clear skies during the day. However, there are many places where the sky is cloudy and unrefreshing, and there may be some showers. It may be better to dry your laundry indoors. During the day, the temperature in many places is expected to be around 25 degrees Celsius, making it a summer day in some places, and it will feel hot and humid.



Southern Kyushu, Okinawa and Amami regions will experience rain throughout the day due to the influence of the rainy season front, and there will be heavy rain accompanied by thunder in some places. A landslide danger warning has been issued for Toshima Village in the Amami region, so please be careful of landslides.
In Okinawa, rain will continue from tomorrow the 10th (Wednesday) to around the 11th (Thursday) due to the influence of the rainy season front, and there is a risk of heavy rain reaching warning level. Please be careful of landslides, flooding of low-lying areas, and rising river waters.

National and weekly weather for tomorrow, June 9th (Tuesday)

2026/06/08 18:46

Tomorrow, a low pressure system is expected to pass over Hokkaido, and the seasonal rain front extending from the low pressure system is expected to stay on the southern coast of Honshu.
Hokkaido may experience increased rain and wind due to the effects of low pressure. Please be wary of heavy rain and landslides in Okinawa and Amami, which are close to the rainy season front.


Clouds are spreading from Kanto to the west, and it looks like it will be a dull day. The rain will stop in many places by morning, but it will remain on the Pacific side of western Japan and north of the Kanto region. The heat will be moderate across the country, with the expected maximum temperature expected to be around 25 C in eastern and western Japan, and around 15 C in Hokkaido.



The weather will start to improve after the day after, and it looks like it will be a sunny spell during the rainy season. There is a risk of disaster-level heavy rain in Okinawa and Amami, which are close to the front, into the 11th. Please be careful of landslides, etc.

The rainy season has started in many places, so when is the chance to dry your laundry outside

2026/06/08 16:25

In June, the rainy season has begun to be announced one after another in various places, and the full-fledged rainy season is beginning.

Southern Kyushu: Around June 1st (normal)/16 days later than last year
Shikoku: Around June 2nd (3 days earlier than normal)/16 days later than last year
Northern Kyushu Around June 4th (normal)/19 days later than last year
China Around June 4th (normal)/19 days later than last year
Kinki Around June 4th (normal)/18 days later than last year
Tokai Around June 7th (normal)/21 days later than last year
Kanto-Koshin Around June 7th (normal)/16 days later than last year

Today, the 8th (Monday), the rainy season front passes from the east of Japan near the Nansei Islands and extends to the continent. In addition, there is a low pressure system in the Sea of Japan, moving towards the
northeast. As a result of this, it is raining in northern Japan, Hokuriku, and western Japan, and especially in southern Hokkaido, San'in, Kyushu, and the Nansei Islands, active rain clouds are forming.



The front is expected to remain stationary in the south of Japan, and
the weather is likely to remain unsettled.



One of the concerns during the rainy season is the drying of laundry.
Western Japan can expect sunshine on Wednesday and northern Japan on Thursday, while the Kanto region is expected to remain cloudy.
Saturday, the 13th, is likely to be a valuable opportunity for outdoor drying nationwide.



When a front approaches, the weather can change suddenly.
Please continue to pay attention to the latest weather information.

Today's 7th (Sunday) Afternoon Weather What is the weather like in the Kanto Tokai region where the rainy season has started today The Pacific side of Shikoku to Kinki and the Izu Islands are on alert for heavy rain.

2026/06/07 14:06

A low pressure system that has changed from a tropical cyclone is expected to move east along the southern coast of Honshu this afternoon, the 7th (Sunday).

Very humid air from the tropics flowed into the lower layers, and extremely heavy rain of 55.5 mm per hour fell in Aburatsu, Nichinan City, Miyazaki Prefecture.
Also, the 24-hour rainfall up until yesterday was 236.5 mm on Kikaijima (Kagoshima), a record heavy rain for June.

Currently, the active rain clouds have left Kyushu, but the atmospheric conditions in Kyushu are unstable due to the influence of warm and humid air, mainly in the south.
Tonight, watch out for landslides, flooding of low-lying areas, rising river waters, lightning strikes, and gusty winds.




Today, the 7th (Sunday) afternoon, the heavy rain area will move from Kyushu to Shikoku and Kinki. In Shikoku, extremely heavy rain of over 50mm per hour will occur in some places until the afternoon.
Rain is likely to peak in the Kinki region from the evening until early tonight, in the Tokai region from the evening until late tonight, and in the Kanto-Koshin region (centered on the Izu Islands) from early morning to the morning of the 8th (Monday).



24-hour rainfall is expected to reach 200 mm in many places in Shikoku by noon tomorrow, the 8th (Monday).

When heavy rain occurs, please pay attention to the following points to ensure your safety.

+Stay away from rivers and irrigation canals.

+When driving, avoid underpasses and other low-lying roads

+You never know when steep slopes such as mountains may collapse, so never approach them and evacuate to the opposite side of the slope.

Be careful and be on guard against landslides, flooding of low-lying areas, and rising river waters. Also, be careful of strong wind gusts such as lightning and tornadoes.

Rainy season announced in Kanto and Tokai regions; rainy season has officially arrived in eastern Japan

2026/06/07 12:03

Today, the 7th (Sunday), the Japan Meteorological Agency announced that the Kanto and Tokai regions appear to have entered the rainy season.

The Kanto and Tokai regions are cloudy and rainy due to the front and humid air. The rainy season has been announced as cloudy and rainy weather will continue for the next week due to the influence of fronts and humid air.
In both the Kanto and Tokai regions, the announcement of the onset of the rainy season this year is about the same time as in normal years. Last year, the rainy season started much earlier than usual, and compared to last year, it was 21 days later in the Tokai region and 16 days later in the Kanto region.



The seasonal rain front is expected to remain in the south of Honshu for the next week.
The Kanto and Tokai regions are expected to have many cloudy days, while northern Kyushu and Kinki, where the rainy season has already been announced, are expected to see some sunny days. Some places may be closed during the rainy season. Rainy days are likely to continue in the Okinawa area due to the stationary front.

In the second half of June, the front will move northward little by little, and the rainy season front will likely become stationary near Honshu. Depending on the weather conditions, there may be heavy rain, so be sure to check the latest weather information frequently.



+The rainy season is a seasonal phenomenon, and there is an average "transition" period of about 5 days.
+Information regarding the rainy season is announced as a preliminary report based on the current weather history and the weather outlook for about a week or more. The start and end of the rainy season may be revised at a later date based on the actual weather conditions from spring to summer.

Linear rain belt may occur in southern Kyushu and Amami; strict warning against landslides

2026/06/07 07:44

A front is extending from southern China through the Nansei Islands to the south of Japan, and there is a low pressure system in the East China Sea above the front, which is moving east-northeast.
Warm, humid air originating from the tropics is flowing towards fronts and low pressure systems, causing extremely unstable atmospheric conditions mainly on the Pacific side of western Japan.
For this reason, extremely heavy rain of 55.5 mm/h has been observed in Aburatsu, Nichinan City, Miyazaki Prefecture in southern Kyushu, and there are also places in the Nansei Islands where heavy rain is accompanied by thunder.
As of 7:30 a.m., a level 4 landslide warning has been issued for Nichinan City, Miyazaki Prefecture.

The low pressure front is expected to pass through southern Kyushu during the day today, the 7th, and move east-northeast along the southern coast of Honshu into tomorrow, the 8th (Monday).



[Rain Forecast]
Very heavy rain is expected in western Japan and the southwestern islands, potentially leading to torrential downpours.

In southern Kyushu and the Amami Islands, a linear rainband may form, rapidly increasing the risk of heavy rain-related disasters.

The areas and periods where the risk of heavy rain-related disasters may rapidly increase are as follows:

(Southern Kyushu and Amami Islands) Miyazaki Prefecture: From early morning to midday today, the 7th

(Southern Kyushu and Amami Islands) Kagoshima Prefecture (excluding the Amami Islands): From early morning to midday today, the 7th
+Precipitation expected for 24 hours by dawn on the 8th (Monday)
Shikoku region 300mm
Southern Kyushu/Amami region 150mm
If a linear precipitation band occurs, there is a risk of further locally increased rainfall.

[Disaster Prevention Matters]
In the southern Kyushu and Amami regions, please be extremely cautious of landslides today, the 7th, and be cautious of flooding of low-lying land, rising water levels, and flooding of rivers. Today, the 7th, the Shikoku region requires caution and vigilance against landslides, flooding of low-lying areas, and rising river waters. Also, be careful of strong wind gusts such as lightning and tornadoes.

Today's weather on the 7th (Sunday): A low-pressure system moves eastward along the southern coast of Honshu; there is a risk of extremely heavy rain on the Pacific side of western Japan.

2026/06/07 06:32

Today, the 7th (Sunday), a low pressure system that has changed from a tropical cyclone is expected to move along the southern coast of Honshu, accompanied by a front. As moist air from the tropics flows towards the low pressure system and front, rain clouds will develop from western Japan to eastern Japan, mainly on the Pacific side, and there is a risk of heavy rain.
There are a lot of clouds in northern Japan, so it looks like the sky will be perfect for folding umbrellas.



Due to the influence of a low pressure system that has changed from a tropical cyclone, it will rain widely in western Japan from the morning. The sky looks like it will rain easily throughout the day. Especially on the Pacific side, there is a risk of extremely heavy rain of more than 50mm per hour. Please be wary of landslides, flooding of low-lying areas, and rising and flooding rivers.

In the afternoon, the rain will spread to eastern Japan. It looks like it will start raining in the Kanto region from the evening. Please bring rain gear even if it is not raining when you go out.

The sky is dominated by clouds even in northern Japan. There is a possibility of rain showers in many places, so it is a good idea to have a folding umbrella with you when going out.

Temperatures across the country will be at or below normal in many places. Temperatures in northern Japan are likely to be higher than the previous day, but will still be below normal. Please be careful when choosing your clothes.
In many places from eastern Japan to western Japan, the weather will be near normal. It seems to be a comfortable place to spend time during the day.

Weather from tonight to tomorrow 7th (Sunday) Rain gradually expands to the east. Southern Kyushu and Shikoku are also on high alert for heavy rain

2026/06/06 18:45

It will rain in many places in Amami and Okinawa tonight, and it will start raining widely in southern Kyushu. Active rain clouds are expected to cover the Shikoku region tomorrow, the 7th (Sunday). Please take extreme precautions against landslides in southern Kyushu, Amami, and Shikoku. Also, please be careful of landslides in Okinawa.



The front will slowly move northward from tonight until tomorrow 7th (Sunday), and the low pressure on the front is expected to pass near southern Kyushu during the daytime of tomorrow 7th (Sunday). Atmospheric conditions will be extremely unstable around fronts and low pressure systems.




It will rain in many places in Amami and Okinawa tonight, and heavy rain is expected to be accompanied by thunder in some places. Rain will begin to fall widely in southern Kyushu at night, and there is a risk of localized extremely heavy rain and thunderstorms into tomorrow, the 7th (Sunday). In Shikoku, there will be intermittent rain tonight, mainly on the Pacific side, due to the influence of moist air flowing in, and tomorrow, the 7th (Sunday), there will be extremely heavy rain and thunderstorms in some places due to the effects of low pressure and fronts.


The Nansei Islands and western Japan are expected to experience very heavy and heavy rainfall.
The 24-hour precipitation expected from 18:00 on the 6th to 18:00 on the 7th is expected to be high in places,

Shikoku region 300mm
Southern Kyushu/Amami region 250mm
Okinawa region 100mm
Then, the 24-hour precipitation expected from 18:00 on the 7th to 18:00 on the 8th is expected to be high
Shikoku region 100mm

.
If a linear precipitation band occurs, there is a risk of further rainfall locally.

Be wary of landslides, flooding of low-lying areas, rising river waters, and be careful of gusts of wind such as tornadoes.