Typhoon No. 25 Dujuan approaches Tokyo 20–21 Sept (Silver Week): heavy rain at Narita and Haneda, gusts to 45 knots Monday morning

This week's news · Checked 2026-09-20

What happened. Typhoon No. 25 Dujuan is forecast to pass offshore southeast of the Boso Peninsula on the morning of Monday 21 September 2026, in the middle of Silver Week (19–23 September). According to Weathernews' aviation forecast (18 September, 16:00 JST): Narita gets moderate rain and thunderstorms on 20–21 September, with winds peaking around 25 knots on the 21st daytime and easing after 21:00 JST; Haneda sees winds above 30 knots around 09:00 JST on the 21st with gusts up to 45 knots, moderate rain continuing, easing after 21:00 JST. Tokai Kisen ferries to Oshima, Toshima and Mikurajima were cancelled on 19 September, and ANA cancelled all Hachijojima flights on 20 September (The Japan Times, 18 September; ferry reports 19 September).

Update, 22 September 2026: what happened on Monday 21. Dujuan did not come ashore on the Japanese mainland; it passed through the Izu Islands moving northeast at about 35 km/h. As many as 500 international and domestic flights were cancelled at Haneda and Narita on 21 September; JR warned of delays and cancellations on the Tokaido Shinkansen, and JR East suspended some lines in Chiba, Ibaraki and western Tokyo for part or all of Monday. A level 3 alert was issued for central Tokyo, with up to about 350 mm of rain expected (UPI, 21 September 2026, citing the Japan Meteorological Agency). If your flight was cancelled, rebooking goes through the airline; keep the cancellation email for a travel-insurance claim.

Update, 23 September 2026. Malay Mail (22 Sept, Bernama-Kyodo): six dead and six missing in Tokyo and nearby areas after landslides and flooding on 21 September; about 58,000 households in Chiba lost power early on 22 September; landslides in Yokosuka and Miura (Kanagawa). Central Tokyo's tourist areas were operating normally on 22–23 September; in Chiba (Narita, Disney) check local road and rail status before travelling.

Update, 24 September 2026: Chiba railways. According to TRAICY (24 Sept, citing JR East), the Narita Express is running as normal, so Tokyo ⇄ Narita Airport is not affected. What remains damaged are local Chiba lines: the Uchibo Line between Anegasaki and Kisarazu is expected to stay closed for at least three months, the Sobu Main Line between Enokido and Naruto for about a month, and the Narita Line between Sawara and Choshi for about two weeks. If your plan includes Choshi, Kamogawa or the Boso coast in October–December, switch to buses or another destination. The death toll rose to nine on 23 September (News On Japan).

Update, 28 September 2026: some Chiba lines reopen. JR East resumed the Uchibo Line between Kisarazu and Awa-Kamogawa from the first train on 26 September, but the section from Chiba, Anegasaki–Kisarazu, still needs "at least around three months", so by rail from Tokyo you cannot get through on the Uchibo side yet. The Narita Line between Sawara and Choshi is targeted to reopen on 4 October (the Kururi Line Kisarazu–Kururi on 3 October), which would put Choshi back within reach by train via Narita. Limited express Sazanami is suspended and only Shiosai Nos. 4, 6 and 11 run; replacement buses on the four suspended sections were to start on 28 September (TRAICY, 26 September, citing JR East). Check JR East's notice again before you go.

What it means for you.

• Flying into or out of Tokyo on 20–21 September: delays and cancellations are likely, especially Monday 21 morning to afternoon. Check your flight status the night before in the airline app; if a typhoon waiver lets you change dates free, use it. Get to the airport early, and don't connect to a domestic flight with less than 3 hours.
• Shinkansen and trains: the Tokaido line may slow or stop if winds exceed limits; the same day is also a Silver Week return day (Wednesday 23 is busier). If you can, move Tokyo ⇄ Osaka on the morning of the 20th or from the 22nd. The Nozomi is still 100% reserved until 23 September (explainer).
• Izu and Ogasawara islands: ferries are cancelled; don't plan island trips until 23 September.
• From 22 September Kanto weather recovers. This is the second typhoon this month after No. 24 Krovanh (what happened); September is the peak typhoon month, see weather by month to plan.

Sleeping near the airport the night before a morning flight on 21–22 September: Narita and Haneda hotels on Trip.com (filter for free cancellation).

Affiliate links may be used; your price does not change. Sources: Weathernews Aviation, 18 September 2026 16:00 JST (English); The Japan Times, 18 September 2026 (English). UPI, 21 September 2026 (English, citing the JMA). TRAICY, 24 September 2026 (English, citing JR East); News On Japan, 23 September 2026. TRAICY, 26 September 2026 (English, citing JR East). Checked 20 September 2026 morning; updated 28 September 2026.