Typhoon Disrupts Transport Across Japan’s Kanto Region

A typhoon moving toward eastern Japan is causing widespread transport disruption across the Kanto region, with rail operators warning of delays and potential suspensions from the evening of September 20 into September 21, and airlines and airports advising travelers to expect cancellations and difficult access routes.

Rail networks brace for delays and planned cancellations

Publicly available service advisories from JR East show broad risk of delays and cancellations across key Kanto corridors during the peak impact window, particularly from the evening of September 20 through September 21. The operator’s Kanto-area disruption pages flag multiple lines for possible service reductions as conditions deteriorate, a pattern typically tied to wind thresholds, rainfall intensity, and trackside safety checks.

JR East listings highlight the Joban Line (including rapid and local services), the Sobu Rapid Line, the Chuo Sobu local service, the Keiyo Line, and the Musashino Line among routes where delays and cancellations may occur from the evening of September 20 into September 21. The notices also indicate higher disruption risk on coastal and outer-suburban segments in Chiba Prefecture, where stronger winds and heavy rain can trigger section-by-section shutdowns.

Several Chiba-area lines are flagged for potential full-day operational changes on September 21, including sections of the Sobu Main Line (Sakura to Choshi), the Uchibo Line (Kimitsu to Awa Kamogawa), the Sotobo Line (Honda to Awa Kamogawa), the Togane Line (Oami to Naruto), parts of the Narita Line, the Kashima Line (Sawara to Kashima Jingu), and the Kururi Line (Kisarazu to Kazusa Kameyama). Published coverage also shows that localized hazards can compound typhoon disruption, including service pauses linked to heavy rain and slope instability on parts of the Uchibo Line.

Airport operations and access to Narita face knock-on effects

Narita International Airport has posted typhoon-related notices indicating that some flights are already experiencing delays and cancellations and that surface-access routes may also be disrupted. The airport’s public information directs passengers to verify their flight status with carriers and to confirm access options with rail and road operators before traveling to the terminals.

Airlines have also published irregular-operations updates tied to Typhoon 25. ANA’s domestic operations page includes a Typhoon 25 impact notice, and published coverage indicates the carrier has implemented special ticket handling measures for affected periods, including flights linked to Tokyo-area airports from the afternoon of September 20 through September 21. Separate carrier notices, including from ZIPAIR, also reference operational impacts tied to the typhoon, underscoring that disruption may extend beyond domestic services.

For travelers trying to reach Narita during disrupted rail conditions, the challenge is not only flight cancellations but also the reliability of airport access. Narita’s public guidance notes that access by rail and other ground transport can be affected at the same time as flight schedules, raising the risk of missed departures even when flights operate.

Tokyo subways and city services can still be affected

Tokyo’s subway-heavy transport map can give visitors a false sense of insulation from severe weather. Tokyo Metro has published safety guidance noting that seven of its nine routes include above-ground sections, and that service on above-ground stretches can be halted for prolonged periods if wind and rainfall intensify or flooding-prevention systems need to be activated.

Operational impacts can ripple across the metropolitan network because many private railways and subways interline. When above-ground segments outside central Tokyo are slowed or suspended, through-services can be curtailed, leading to crowding and uneven headways in core districts even where tunnels are unaffected.

For travelers navigating the city during the storm window, publicly available delay certificates and line-specific status postings can help explain and document disruptions. However, these documents typically reflect what already happened on a line rather than guaranteeing what will run next, so travelers still need to check live status before entering stations or committing to a long transfer chain.

Added complexity: Narita Express constraints due to ongoing works

Typhoon disruption is landing during a period when some airport-rail patterns are already altered by infrastructure work. JR East has published an advisory on intensive tunnel construction affecting the Yokosuka Line and Sobu Rapid Line corridor, with an all-day suspension between Tokyo and Shinagawa scheduled from September 5 to November 7, 2026.

JR East’s construction notice indicates the Narita Express is affected in this period, with operations adjusted so the limited express runs only to and from Tokyo rather than maintaining its usual set of through patterns. The advisory also notes that alternative transportation via other railway companies will not be provided, making it more important for travelers to confirm which station their Narita Express service actually serves during the construction window.

This matters during a typhoon because airport access becomes a chain of dependencies: if a traveler arrives at the wrong hub or relies on a connection that is suspended, recovery options shrink quickly once planned slowdowns and weather-driven closures start stacking up across the network.

What travelers should do now before heading to stations or terminals

With September 21 falling on a Monday and a public holiday in Japan, demand patterns can differ from a normal weekday while disruption remains severe. Travelers with time-sensitive plans should check operator status pages shortly before departure and again immediately before boarding, as advisories can shift rapidly when wind bands and rain cells move across the region.

For air travelers, the most practical approach during this event is to start with flight status, then work backward to ground access. Narita’s public notice emphasizes that both flights and access can be disrupted; if a flight remains scheduled but rail access is uncertain, passengers may need to depart significantly earlier than usual or consider waiting until the operator indicates services have stabilized.

Finally, travelers should plan for the possibility that conditions worsen overnight and early-morning services are reduced or paused for inspections. JR East’s Kanto-area advisories repeatedly frame the highest disruption risk from the evening of September 20 into September 21, a window that can catch visitors during hotel checkouts, airport transfers, and last trains, when alternative options are limited and station crowding can build quickly.