# Typhoon No. 25 approaching Japan

> Live situation record from CLSTR: https://clstr.news/situations/typhoon-no-25-approaching-japan
> Updated: 2026-09-17T05:05:00.000Z. Sources: 8. Developments: 2.

Typhoon No. 25 is projected to impact Japan during the Silver Week holiday period. Initial reports indicated the storm would develop near the Mariana Islands and move toward the Ogasawara Islands around September 18, potentially reaching areas south of Kanto by September 21. Prior to the typhoon’s approach, regions like Kanto-Koshin had already experienced prolonged heavy rain and low sunshine, causing agricultural damage such as rice sprouting prematurely and vegetable price increases.

As the storm progressed, the Japan Meteorological Agency reported the typhoon moving north near Minamitorishima. Forecasts suggest the peak impact will hit the Kanto region around the morning of September 21, with warnings issued for heavy rain, strong winds, and high waves. There is a significant possibility that the typhoon could make landfall on the Boso Peninsula in Chiba Prefecture on September 21. In the Kanto region, rainfall could reach record levels, potentially exceeding a month’s worth of average precipitation in a single day.

Local authorities have warned of landslides, flooding, and storm surges, particularly in Chiba. Preparations and cancellations are already underway; for instance, a fireworks display at Tokyo German Village has been canceled, and the Rock in Japan Festival is monitoring the situation. Transportation is expected to face major disruptions. JR East has warned of potential delays, route changes, or cancellations for several lines in the Tokyo metropolitan area, including the Shonan-Shinjuku and Utsunomiya lines. In Hachijojima, all flights to Haneda and several ferry services have been canceled, resulting in local food shortages and a surge in hotel cancellations.

## Claims

- Typhoon 25 is expected to approach the Ogasawara Islands through September 19. (corroborated by 5 sources)
- The typhoon is expected to make its closest approach to the Kanto region on September 21. (corroborated by 4 sources)
- There is a possibility that Typhoon 25 will make landfall on the Boso Peninsula in Chiba Prefecture on September 21. (corroborated by 2 sources)
- Typhoon 25 is currently moving west through the Ogasawara Islands. (single source)
- The typhoon is forecast to transition into an extratropical cyclone in the waters east of Japan on September 22. (single source)
- A construction company in Tokyo reported that roof leak repair requests are approximately five times higher than usual due to prolonged rain. (single source)
- Prolonged heavy rain following extreme heat has caused an increase in sightings of poisonous mushrooms, such as the Omoshirokara-kasatake, in Tokyo. (single source)
- Extremely strong winds are expected in the Izu Islands, with the potential to overturn vehicles in motion. (single source)
- Chiba Prefecture is expected to see warning-level heavy rain from September 20 to 21. (single source)
- Kanto could see record-breaking rainfall, exceeding a month's worth of average precipitation in a single day. (single source)
- JR East announced that train delays, route changes, or cancellations may occur in the Tokyo metropolitan area from the evening of September 20 to September 21. (single source)
- All flights between Hachijojima and Haneda are scheduled to be canceled on September 20. (single source)

## Timeline

### 2026-09-17: Typhoon 25 threatens Japan with heavy rain and transport delays

Typhoon 25 is expected to bring record-breaking rain and strong winds to Japan's Kanto and Chiba regions during Silver Week, causing significant transport disruptions and event cancellations.

6 sources. https://clstr.news/cluster/typhoon-25-threatens-kanto-and-tokai-regions-during-silver-week

### 2026-09-15: Typhoon No. 25 threatens Japan during Silver Week holidays

Typhoon No. 25 is expected to approach Japan during the Silver Week holidays, following a period of record-breaking heavy rain that has already damaged crops and caused rising vegetable prices.

4 sources. https://clstr.news/cluster/japan-weather-tropical-depression-expected-to-become-typhoon-25

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Cite as: Typhoon No. 25 approaching Japan. CLSTR, https://clstr.news/situations/typhoon-no-25-approaching-japan