
AI-generated summary
Due to the influence of the front and a tropical cyclone near Shikoku, heavy rain continues, mainly in the Tokai, Kinki, and Shikoku regions.
From Tohoku to Chugoku and Shikoku, on the morning of the 9th, heavy rain was observed in some places due to the influence of a front and a tropical cyclone near Shikoku. The front is expected to move southward off the Pacific coast of eastern and western Japan on the 10th. The Japan Meteorological Agency continues to urge caution against landslides, flooding of low-lying areas, and rising river waters due to heavy rain. People also need to be careful about lightning strikes and gusts of wind.
[Jiji.com Weather Forecast]
There is a possibility that a linear precipitation band will form in the Tokai, Kinki, and Shikoku regions on the 9th. The period is until noon in Wakayama, Tokushima, and Kochi prefectures, until early afternoon in Osaka and Hyogo prefectures, until evening in Mie prefecture, until around 9 p.m. in Aichi and Gifu prefectures, and until late at night in Shizuoka prefecture.
A level 5 flood warning was issued for the Shonai River in Aichi and Gifu prefectures at 6:20 p.m. on the 8th, but was lifted at 12:40 a.m. on the 9th.
In Aoi Ward, Shizuoka City, 262.5 mm of rain fell in the 24 hours up to 7:20 a.m. on the 9th, and in Chikusa Ward, Nagoya City, 219.5 mm fell in the same period up to 1:20 a.m.
The predicted rainfall for the 24 hours up to 6 a.m. on the 10th is expected to be 200 mm in the Tokai and Kinki regions, 150 mm in Shikoku, 120 mm in Kanto-Koshin and Hokuriku, and 80 mm in Tohoku. After that, the rainfall amount until 6 a.m. on the 11th was 80mm in the Kanto-Koshin region.
AI outlook — possibilities, not facts
Linear precipitation belts may occur in the Tokai and Kinki regions
Possible · Within hours
The predicted rainfall until the 10th is expected to be 200mm in the Tokai and Kinki regions and 150mm in Shikoku.
Likely · Within hours

On the 21st, when Typhoon No. 25 passed off the coast of the Boso Peninsula, there was record heavy rain of 278.0 mm in Sakura City, Chiba Prefecture, and 291.0 mm in Kisarazu City, making Sakura City and Kisarazu City record the heaviest rainfall in a single day in statistical history. As a result, landslides have occurred in both prefectures, with reports of flooding around stations, stranded cars, and trapped residents.

On the afternoon of the 21st, Typhoon No. 25 moved northeast over the sea north of Hachijo Island in the Izu Islands and approached the Kanto region. A special landslide warning (alert level 5) has been announced for Oshima-cho, Tokyo, and there is also forecast information for a linear rain belt in the Kanto region. Flights were canceled at Haneda and Narita airports, and there were suspensions and road closures at JR and expressways. It is a strong typhoon with a central pressure of 960 hPa and a maximum wind speed of 40 m/s.

On the morning of the 21st, Typhoon No. 25 moved north over the sea west of Hachijo Island in the Izu Islands, and connected with the Kanto region late at night. The Japan Meteorological Agency has called for strict vigilance for landslides, flooding, and river flooding due to heavy rain in the Kanto-Koshin, Tokai, and Tohoku Pacific sides, and has issued a special landslide warning (level 5) for Izu Oshima. In Funabashi City, Chiba Prefecture, the 12-hour rainfall was 172.0 mm, the highest in September's statistical history. A maximum instantaneous wind speed of 37.0 meters was observed at Hachijojima Airport. The forecast rainfall for the 24 hours until noon on the 22nd is 250 mm in the Kanto, Tokai, and Izu Islands, and 150 mm in the Tohoku region.

Large and strong Typhoon No. 25 is expected to move north over the sea to the west of Hachijo Island in the Izu Islands on the morning of the 21st, and after making a substantial connection to the Kanto region late on the same day, it is expected to move away toward the eastern Tohoku region. The Japan Meteorological Agency has called for strict vigilance in the Tohoku-Pacific region, Kanto-Koshin, and Tokai regions against landslides, flooding of low-lying areas, and rising river waters due to heavy rain, as well as warning against strong winds and high waves. A linear precipitation zone has been predicted for the Kanto-Koshin and Tokai regions, with the possibility of occurrence in Shizuoka Prefecture until the evening of the 21st, in the Izu Islands, Kanagawa and Yamanashi prefectures until the evening, and in Ibaraki, Saitama, Chiba and Tokyo until late at night. At Hachijojima Airport, a maximum instantaneous wind speed of 37.0 meters was observed just after 7:35 a.m., and in Funabashi City, Chiba Prefecture, rainfall in the 12 hours up to 8:20 a.m. was 172.0 mm, breaking the all-time record for September at that location. As of 10 a.m., Typhoon No. 25 was traveling approximately 110 kilometers west-southwest of Hachijo Island toward the northeast at 20 kilometers per hour, with a central pressure of 960 hectopascals, maximum wind speed of 40 meters, and maximum instantaneous wind speed of 55 meters. A storm area with wind speeds of 25 meters or more is within a radius of 185 km, and a strong wind area with wind speeds of 15 meters or more is within a radius of 650 km to the east and 440 km to the west. The predicted rainfall for the 24 hours until noon on the 22nd is expected to be 250 mm in the Kanto, Tokai and Izu Islands, and 150 mm in Tohoku.

Typhoon No. 25 moved westward over the western coast of the Ogasawara Islands on the morning of the 19th, and continued to grow in strength as it moved northward. It is expected to move northeast near the Izu Islands and off the Kanto coast on the 21st. The Japan Meteorological Agency has issued a warning for strong winds, high waves, and heavy rain in the Kanto, Tokai, Izu Islands, and Pacific coasts of Tohoku. A maximum instantaneous wind speed of 30.4 meters was observed on Chichijima. The predicted 24-hour rainfall is 120 mm in the Izu Islands and 80 mm in the Kanto region.

At 4:15 a.m. on the 7th, the Japan Meteorological Agency announced a Level 5 landslide special warning for the northern part of the Izu Islands. The target area is Niijima Village, Tokyo. Due to the effects of Typhoon No. 24 and the front, heavy rain of 250 mm is expected in the Kanto-Koshin region and 300 mm in the Tokai region, and JR East has announced suspension of service on various lines in the Tokyo metropolitan area.