Using an IC Card for Transit: Tapping In, Tapping Out, and Fare Mechanics
Using an IC card for transit means tapping a prepaid card at rail gates and bus readers instead of buying a paper ticket for each ride.1 Get the two taps right and fares settle themselves; miss one and the exit gate stops you until staff or a machine clears the record.2
Fees, rules, and requirements can change. Confirm current details at JR East, JR West, PASMO, Tokyo Metro, and Toei Transportation official pages.
Overview
A 交通系ICカード (kotsukei IC kado, "transportation IC card") is a contactless stored-value card: you tap it at ticket gates and bus readers and the fare is deducted automatically.3 It covers trains, subways, buses, and monorails wherever the IC mark appears.14
This article covers only the in-transit mechanics: how rail gates pair an entry tap with an exit tap, how bus taps change by region, and how to recover from a missed tap or a low balance.152 Where to buy a card, deposits, tourist products, validity, and routine charging belong to IC Cards for Visitors: Suica, Pasmo, ICOCA, and the 2023 Compatibility Changes and are not repeated here.143
How Rail Gates Calculate Your Fare
Rail gates work as a pair. The entry tap opens the trip and the exit tap closes it, with the fare set by the distance between the two points.12
The diagram above shows the normal path plus the two failure exits described in this section.12
Tapping in at entry
Touch your card to the reader on the automatic gate and walk through on the beep.6 JR West describes the same motion as passing the card over the reader with no ticket needed.4 The gate stores your entry station at that moment.2
Use one card for one person for the whole ride.7 You cannot tap a single card through for two riders, since the gate links one entry record to one traveler.7
Gate readers pair entry and exit by medium. Tokyo Metro states that entry and exit on a different card or device is not possible, including a phone carrying the same card number.7 Switching from plastic to phone mid-trip strands both records.
Tapping out at exit and fare settlement
Touch the same card to the exit reader.1 JR East states the fare is calculated automatically at the station where you get off.1 The display shows your remaining balance as you pass.16
Rail fares are distance based, so the gate charges the actual distance traveled rather than a flat amount.2 The IC tap covers the base fare only. A separate ticket is still required for a super express, express, or Green Car upgrade; for on-board rules see Shinkansen and Train Etiquette for Visitors.1
Two limits catch visitors. IC travel cannot cross area boundaries in one continuous ride, so a Tokyo area entry cannot exit in the Sendai area on card fare alone and needs separate tickets.1 Within the ICOCA area, JR West caps IC trips at 200 km except inside the Osaka suburban area and specified limited-express pairs, and ICOCA cannot be used on Shinkansen trains.8
How Bus Tapping Changes by Region
Buses do not follow one national tapping pattern. The number of taps and the door you use depend on whether the bus runs a flat fare or a distance fare, and operators set their own boarding rules.5 Check the door signs or ask the driver before assuming the pattern from the last city still applies.5
The choice below follows the fare system posted at the bus stop or by the door.5
The diagram above compresses the flat fare versus distance fare split plus the one-tap versus two-tap rule.56
| Pattern | Board | Tap points | Fare logic |
|---|---|---|---|
| Flat fare, front board | Front door | Once on boarding | Same fare any distance |
| Flat fare, rear board | Rear door | Once on alighting | Same fare any distance |
| Distance fare, rear board | Rear door | On boarding plus on alighting | Fare by distance |
The table reflects standard operator patterns that recur across cities; your specific bus follows the signs at its own door.5
Flat fare buses tap once
On a flat-fare bus the fare is identical for any distance, so you tap once.5 The tap happens on boarding or on alighting depending on the operator.5
Tokyo metropolitan buses commonly board at the front and collect payment up front.5 That front-board pattern is the major exception. Many other cities board at the rear and settle at the front on exit.5
Establishment scope matters here. Toei Bus accepts PASMO and Suica on all Toei Bus routes except the Koto Route 01 community bus Shiokaze.9 On some flat-fare rear-board services you board at the back and tap the standard fare as you exit at the front.5
Distance fare buses tap twice
On a distance-fare bus the fare rises with distance, so you tap on boarding to record the start and tap again on alighting to settle the fare.56 PASMO describes bus use the same way: touch the card to the reader inside the bus to pay the fare.6
Rear-board distance-fare buses take the entry tap at the rear door and the exit tap at the front.5 Cash riders on the same bus take a 整理券 (seiriken, "numbered boarding slip") on boarding and match its number to the fare display at the front.5 Your two taps replace that slip.
Boarding side signals the fare system. Front boarding in Tokyo usually means pay as you board, while rear boarding elsewhere usually means tap on entry and pay on exit.5 When unsure, board where others board and tap where others tap, then confirm with the driver.
When a Tap Fails or the Balance Runs Low
A red light and beep at the gate is a normal error state, not a penalty. Step aside, read the situation, and clear it at a machine or with staff.2
A missed tap in causes exit gate errors
If the entry tap never registered, the card carries no entry record and the exit reader rejects it.2 The gate flashes red and stays closed.2
Only a station attendant can rebuild the missing record by checking your origin station and settling manually.2 Do not force the gate. Use the gate intercom or find the staff window.2 A cross-company transfer with an unpaid connecting difference can block the exit the same way even when both taps registered.2
Fare adjustment machines and staff help
When the balance is too low, the exit gate flashes red because the fare due exceeds the stored value.2 JR East states you must top up when the balance is insufficient.1 Top up at a nearby fare-adjustment or charge machine using the Charge button, then tap again at the gate.21
Fare-adjustment machines sit near the gates in the ticket-machine area.2 Most stand outside the gates with a few inside large stations, so a rider blocked inside should press the gate intercom first and settle outside before re-entering.2 Newer machines carry an English button for English, Chinese, or Korean, while older machines are Japanese only with intuitive icons.2
Machine payment is cash everywhere, while some newer machines also deduct from an IC card or accept credit cards at major JR East stations (as of 2026-05; confirm current machine terms with the operator).2 On buses, IC charging is driver assisted and restricted to 1,000 yen bills only, with a 10,001 yen post-charge ceiling on buses (as of 2026-09).6 Toei Bus applies the same 1,000 yen bill only rule for on-board charging and accepts only 1,000 yen bills and coins for on-board cash fares (as of 2026-09).9
Simple shortages clear at the machine in about 30 to 60 seconds.2 Lost entry records, transfer problems, or language help are staff jobs and take a few minutes at the window.2
Good to know
Use the same card to tap in and tap out
Switching cards between entry and exit leaves an open entry on one card and an entry-less exit on the other.7 Tokyo Metro states the gate cannot pair trips across different cards or devices, including a phone that carries the same card number.7 Pick plastic or phone at entry and stay with it until you exit.
Watch the boarding door before you tap on a bus
The boarding door tells you the fare system.5 Front boarding in Tokyo usually means payment on entry, while rear boarding in most other cities means entry tap at the back and payment at the front.5 Flat-fare buses need one tap and distance-fare buses need two, so a Tokyo habit applied in another city taps at the wrong time.5
A low balance stops you at the exit, not the entry
Entry succeeds because no fare is due yet, then exit blocks when the distance fare exceeds the stored value.12 This surprises riders who watched the entry gate open without trouble. Keep a small buffer on the card and clear the shortage at a fare-adjustment machine before retrying the gate.12
Card purchase and top-up detail lives elsewhere
This article does not teach where to buy a card, what deposit applies, which tourist products exist, how long cards stay valid, or how routine charging works.143 Those mechanics belong to the IC card acquisition article. Use that reference for shopping and charging strategy and use this article for the tap mechanics once you ride.36
See also
- IC Cards for Visitors: Suica, Pasmo, ICOCA, and the 2023 Compatibility Changes
- Navigating Tokyo's Subway and Rail Network
- Navigating Osaka and Kansai-Area Transit
- Shinkansen and Train Etiquette for Visitors
- Mobile and Contactless Payment Options for Visitors