
AI-generated summary
Typhoon No. 25 remains large and strong, approaching the Kanto region from the Izu Islands. A special landslide warning was issued in Oshima Town from the 7th to the 8th, making it the second such warning to be issued this year.
On the afternoon of the 21st, large and strong Typhoon No. 25 moved northeast over the North Sea off Hachijo Island in the Izu Islands and approached the Kanto region. The northern part of the archipelago, as well as Kanagawa and Chiba prefectures, experienced severe storms, and the Japan Meteorological Agency issued a special level 5 landslide warning for Oshima Town (Izu Oshima) in Tokyo at 12:40 p.m. No. 25 is expected to pass off the southeast coast of the Boso Peninsula on the same night, and then move away to the east after dawn on the 22nd.
[Jiji.com Weather Forecast]
This is the second time this year that a special landslide warning was issued in Oshima Town from the 7th to the 8th due to the front. Rainfall in the town in the 48 hours up to 2:40 p.m. reached 740.5 mm. Takuya Hosomi, head of the agency's forecast division, said at a press conference, ``There is an extremely high possibility that some type of disaster has already occurred in landslide-prone areas, so please immediately ensure your safety.''
In Kanto and other areas, forecast information for a linear precipitation belt was issued. The outbreak is expected to occur in the Izu Islands and Kanagawa and Yamanashi prefectures until around 9 p.m. on the 21st, and in Tokyo (excluding islands) and Ibaraki, Saitama, and Chiba prefectures until late at night.
Many flights to and from Haneda and Narita airports have been canceled due to wind and rain. In Chiba Prefecture, JR has canceled operations on some sections of the Sobu Line, Uchibo Line, and Sotobo Line, and some sections of the Ken-O Expressway and Higashi-Kanto Expressway have been closed to traffic.
At 2 p.m., No. 25 headed northeast at 30 kilometers per hour over the ocean about 50 kilometers north-northwest of Hachijo Island. The central pressure was 960 hectopascals, the maximum wind speed was 40 m/s, and the maximum instantaneous wind speed was 55 m/s. The area within a radius of 185 kilometers is an area with strong winds of 25 m/s or more, and the area within 650 km to the east and 440 km to the west is an area of strong winds with winds of 15 m/s or more.
AI outlook — possibilities, not facts
Typhoon No. 25 is expected to move away to the east after dawn on the 22nd.
Likely · Within hours
A linear precipitation band will occur in the Kanto region, with the possibility of heavy rain until late at night.
Possible · 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 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.

On the morning of the 9th, rain became heavier from Tohoku to Chugoku and Shikoku due to a front and a tropical cyclone near Shikoku. The Japan Meteorological Agency has called for caution against landslides, flooding, and river flooding, and has suggested that a linear precipitation band may occur in the Tokai, Kinki, and Shikoku regions. Although the special flood warning for the Shonai River has been lifted, Aoi Ward in Shizuoka City and Chikusa Ward in Nagoya City recorded 262.5 mm and 219.5 mm of rainfall over a 24-hour period, respectively. The predicted rainfall until the 10th was announced to be 200mm in the Tokai and Kinki regions and 150mm in Shikoku.

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.