Japan Autumn Typhoons (Shinkansen Planned Suspension, Explained)
The announcement you need to understand is made while the sky over Tokyo is still clear.
Japan's railways do something that surprises visitors from almost everywhere else: they stop the trains in advance, on a forecast, and they say so a day or two ahead. The Japanese term is keikaku unkyu — planned suspension — and once you know it exists, a Japanese typhoon stops being a question of whether your train will run and becomes a question of whether you read the notice in time.
Planned suspension is a policy, not an emergency
The old approach was to run until conditions became unsafe and then stop, which left trains and passengers stranded in awkward places and produced long, unpredictable recovery. The current approach is to decide in advance which sections will not run and for how long, publish that, and clear the network before the weather arrives.
The Ministry of Land, Infrastructure, Transport and Tourism asks operators to give early notice when a line is likely to be affected, and in practice a first announcement often appears one to two days out with the detailed operating plan following the day before. For the Shinkansen the notices tend to be earlier and more precise than for conventional lines, and they are given by line section and time window rather than as a blanket statement.
The consequence for a traveller is counterintuitive. The most useful information arrives before there is anything to see out of the window, and the worst time to start looking for it is the morning you intend to travel.
What the thresholds are, and what is not published
Some of the criteria are in the public domain and some are not, and it is worth being clear about which is which.
Rainfall is the published side. Sustained rain above roughly 20 mm an hour, or a cumulative total around 100 mm, is the region where landslide risk on mountain corridors becomes the governing concern, and suspensions can be issued on those grounds well before conditions in a city look dramatic. On the Tokaido Shinkansen the rain gauges through the Shizuoka section are the recognised choke point: that stretch runs along terrain that constrains the whole line, and enough water there halts services that have nothing to do with Shizuoka.
Wind is the less transparent side. Operators run wind thresholds along exposed sections and reduce speed or suspend on them, but the specific figures and the internal decision rules are not published in a form a traveller can look up. Anyone telling you the exact wind speed at which a Shinkansen stops is reconstructing it rather than citing it.
The rainfall figures above are as reported in public guidance on planned suspension; operator wind thresholds and internal decision criteria are not published. There is no machine-readable archive of Japanese planned-suspension notices, so this page carries no computed table and uses two decision tools instead. Checked 26 September 2026.
That asymmetry matters because it tells you what to watch. You cannot predict the decision from a wind forecast, and you should not try. You can, however, read the notice as soon as it exists, and the notice is the only thing that is actually authoritative.
Checklist one: reading a JR notice
JR notices follow a consistent shape. Once you can locate four things in one, the rest is noise.
- Which line, and which section. A suspension is almost never the whole network. "Tokyo–Nagoya" and "Nagoya–Shin-Osaka" are separate decisions and one can run while the other does not.
- The time window. Notices give a start time and often an expected resumption. A window that ends "for the rest of the day" is a different proposition from one that ends at two in the afternoon.
- Whether it is confirmed or possible. Early notices say services may be suspended; the later one says they will be. The first is a warning to change plans, the second is a fact to plan around.
- Whether reserved seats are being cancelled. This is the line that decides what you do next. If reservations on the affected trains are voided, your ticket becomes refundable and the queue to rebook starts immediately.
Two habits are worth more than any of the above. Check the operator's own English page rather than a news aggregator, because the aggregator lags by hours. And check the conventional line as well as the Shinkansen if your journey has a local leg — the local line is usually the first to go and the last to come back, and a running Shinkansen is no use if you cannot reach the station.
Checklist two: what to do, in order
| When | What to do |
|---|---|
| Two days out, storm forecast toward Honshu | Decide now whether to travel a day early. Moving forward is cheap; moving back is not. |
| First notice appears ("may be suspended") | Rebook to a day either side if your dates allow. Reservations are still freely available at this point. |
| Detailed plan published, day before | This is the real decision. If your section is listed, do not travel to the station to check. |
| Your reserved train is cancelled | Refund or change without fee is standard. Do it online rather than at a counter if you can. |
| You are mid-journey when it is announced | Get to a major station, not a small one. Options, staff and hotels exist at the former. |
| Services resume | Expect reduced frequency and heavy loading for a day. Unreserved cars fill first. |
| You have an international flight the same day | Assume the rail leg will not happen. Go the night before and stay near the airport. |
The conventional lines are the ones that strand you
Almost all of the attention goes to the Shinkansen, and almost all of the actual trouble happens on the local network.
Conventional lines suspend earlier, on lower thresholds, and with less notice, because they run at grade through terrain that the Shinkansen bridges or tunnels past. They also restart more slowly, because a track inspection on a two-hundred-kilometre local line takes longer than on a purpose-built high-speed corridor with its own monitoring.
The practical failure is the mismatch. A traveller checks the Shinkansen, sees it running, travels to a regional city, and then finds the branch line from the Shinkansen station to where they are actually staying has been suspended since the previous evening. The long-distance leg worked and the last fifteen kilometres did not.
So the rule is to check the whole chain, and to check it in reverse order: the final local leg first, then the Shinkansen. If the local leg is gone, the Shinkansen running is irrelevant and you should stay where you are.
The same logic applies to airport access. Narita and Kansai are both reached by rail lines that are more exposed than the airports themselves, and a flight operating out of an airport you cannot reach is a familiar and entirely avoidable predicament. During a planned suspension, the airport bus network sometimes continues after the trains have stopped, and sometimes does not; it is worth knowing which before you need it.
Autumn specifically
Japan's typhoon exposure is not evenly spread across the season, and the autumn systems behave differently from the summer ones in a way that matters for rail.
Late-season storms tend to recurve and accelerate as they approach, running up the Pacific side rather than crossing slowly. A fast-moving system produces a shorter, sharper disruption window — often a single day rather than two or three — but it also gives less notice, because the track guidance firms up later. The suspension may be announced with less lead time than in August, and it may be over sooner.
Autumn also brings the rainfall-driven case that has nothing to do with wind at all: a storm passing well offshore can push a rain band onto the mountains and trigger a suspension on the 20 mm an hour threshold while the coast stays bright. This site has a longer piece on how a typhoon crossing Japan the wrong way behaves, and the same principle applies to the rail network: the position of the rain matters more than the position of the centre.
Official train information is published by the operators themselves — JR Central for the Tokaido Shinkansen, JR East and JR West for their own networks — and the weather behind it by the Japan Meteorological Agency, whose English typhoon page carries the current position and five-day track. JMA also publishes a live warnings map covering rainfall and landslide alerts, which is the product that most often sits behind a rail suspension.
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