Suppose two adults are traveling from Tokyo to Osaka with children aged seven and four. For ordinary IC-compatible city trains, each adult needs a way to tap through the gate, and the seven-year-old needs a child-fare card or ticket. The four-year-old usually travels without a separate local-train card when accompanied under the applicable operator’s infant rules. But the Tokyo–Osaka Shinkansen is a separate booking decision, and a reserved seat for the four-year-old requires the applicable child fare under JR Central’s rules. One family can keep using compatible Suica, PASMO or ICOCA cards for eligible rides in both cities; there is no need to buy a new card merely because the trip changes cities. JR East’s card-area guidance, JR West’s interoperability guidance and JR Central’s child-ticket rules explain these separate decisions (checked September 24, 2026).
The quick family answer
| Traveler | Ordinary IC-compatible city ride | Tokyo–Osaka Shinkansen |
|---|---|---|
| Adult 1 and adult 2 | An adult IC card each, or an accepted individual ticket/payment method | Buy each person’s intercity travel through the operator or booking service; an IC card may be assigned as a boarding credential |
| Seven-year-old | Their own child-fare IC card or child ticket; bring age ID for card purchase | Book the applicable child fare and a seat if wanted |
| Four-year-old | Usually no separate card with accompanying adult under JR infant conditions; check the specific private railway or bus | If occupying a reserved seat, buy the applicable child ticket; otherwise check that operator’s infant/companion terms |
The table describes JR rules as a starting point rather than a single fare policy for every bus or private railway. JR Central classifies most seven-year-olds as children and four-year-olds as infants. Under its rules, infants are generally free with a paying companion, but their own reserved seat requires the child fare; a third accompanying infant and an infant traveling alone also require tickets. The school-year exceptions for children turning six or twelve should be checked if relevant. Check your train or bus operator for the actual journey. JR Central adults and children (checked September 24, 2026).
Suica, PASMO and ICOCA: one card can work in both cities
Suica is associated with JR East, PASMO with participating Tokyo-area operators and ICOCA with JR West. Their nationwide mutual-use arrangements let you use an eligible card on many participating networks outside its home region: JR West explicitly lists Tokyo’s Suica and PASMO areas as compatible with ICOCA, and JR East lists ICOCA among the compatible card logos. Look for the nationwide IC mark and check the line or bus operator, especially outside major cities. Compatibility does not mean every transport network accepts every card. JR West ICOCA areas, JR East Suica areas and PASMO acceptance caveat (checked September 24, 2026).
A compatible card is not a continuous Tokyo–Osaka tap
You can use an eligible Suica on local rides in Tokyo, then use the same card on eligible local rides in Osaka. That is different from touching in at a Tokyo local gate and expecting the entire intercity ride to settle automatically in Osaka. JR East says its stored-value card cannot be used for a journey crossing separate IC areas in that way. Arrange the intercity ticket separately, and follow the transfer-gate instructions for the product you bought. JR East Suica area restriction (checked September 24, 2026).
Which children need their own cards?
The seven-year-old: obtain a real child card
A seven-year-old traveling on ordinary paid rail services needs a child fare. An adult, unregistered blank card is not a workaround: adult cards deduct adult fares. JR East says a child Suica deducts child fares; PASMO states that its blank adult card cannot be used as a child card. The child card belongs to the named child, and age verification may be required at purchase. JR East Suica, PASMO card types (checked September 24, 2026).
For a short visit starting in Tokyo, Welcome Suica for Children is a documented physical-card option: JR East asks for the child’s passport or other ID, and its designated vending machine also asks you to enter the child’s birth date. It lasts 28 days including the purchase day, with no refund of remaining stored value. For a longer trip, compare the available standard card options at the station rather than assuming the visitor card lasts the whole trip. JR East Welcome Suica purchase and validity (checked September 24, 2026).
If the trip starts in Kansai, ask for こどもICOCA (child ICOCA) at a participating JR West ticket office. JR West’s child ICOCA purchase instructions require its application form and official proof of the child’s name and birth date, such as a passport. A parent can buy it on the child’s behalf. JR West says the automatic machines it lists for a new ICOCA sale sell adult cards only; do not send a family to an adult-card vending machine expecting it to create a child ICOCA. Check the participating office and its opening time before arrival. JR West says child ICOCA cannot be used at automatic gates after March 31 of the fiscal year in which its holder turns 12; ask JR West about the fee-free refund and an appropriate adult card. JR West purchase process and card types (checked September 24, 2026).
PASMO also offers a child card and requires official proof of age. Its own rules say a new child PASMO cannot be bought if the child already has another child PASMO or child Suica. PASMO now also lists a distinct visitor product called TOURIST PASMO, which is valid for 28 days and does not refund its stored value; confirm the precise point of sale and child option if choosing that product. These product terms are not interchangeable. PASMO cards and child rules (checked September 24, 2026).
The four-year-old: decide about the seat before the card
For a four-year-old accompanied by paying adults, the key question is usually whether you need to buy the child their own reserved seat, not which child IC design to pick. On the Tokyo–Osaka JR Central route, infants usually travel free with a paying companion if they do not occupy their own reserved seat; a reserved seat requires the applicable child ticket, and the operator’s two-infants-per-paying-person limit and traveling-alone exception also apply. If in doubt about a specific local bus, private line, airport service, Green Car or Shinkansen booking, check its fare and seat conditions before checkout. JR Central ticket rules and JR East child fare FAQ (checked September 24, 2026).
Buying and using the cards on arrival
Entering through Tokyo
Decide whether the 28-day Welcome Suica product fits your full stay, or whether you need a different standard card. JR East lists Welcome Suica vending machines and travel service centers as points of sale; its current location list includes some temporarily halted locations, so check that list shortly before landing. Bring the seven-year-old’s passport for a child card. The adult and child cards are different fare products even when they work at the same gate. JR East purchase points (checked September 24, 2026).
Entering through Kansai
Get adults’ ICOCA cards from eligible JR West sales points if convenient, and take the child’s passport to a staffed participating sales office to apply for the named child ICOCA. Then use the same eligible cards on Tokyo-area participating services later. For an arrival near office closing time, a child paper ticket for that first journey can avoid basing the whole arrival plan on finding an open counter; check the station’s current sales and fare rules. JR West buying ICOCA and mutual-use area (checked September 24, 2026).
A gate routine that prevents card mix-ups
Give each paying traveler the correct card, let each traveler tap it for their own entry and exit, and keep the four-year-old with the accompanying adult according to station gate instructions. Do not pass one adult card back through the gates to admit a second rider: one card carries its own entry and exit record. At a staffed gate, ask about an unusually wide family gate or how to pass with a child if the automatic gate is awkward. Top up in smaller increments near the end of the trip. JR East usage and cash top-up and JR West use at automatic gates (checked September 24, 2026).
What happens to unused balance?
Read the terms of the specific card in your wallet. A regular JR East-issued Suica has a refundable deposit and remaining-balance refund subject to an operator handling fee, processed by JR East. Welcome Suica lasts 28 days and provides no refund of stored value, while PASMO says its TOURIST PASMO also does not refund added value. JR West’s standard ICOCA has a refundable deposit under its rules, but returning that card to a Tokyo-area operator is not the same as returning it to its issuer. Spend down short-stay card value on eligible rides or participating purchases where appropriate. JR East Suica refund terms, Welcome Suica refund rule, PASMO visitor card and JR West ICOCA (checked September 24, 2026).
Where an IC card stops being the ticket
For a Tokyo–Osaka Tokaido Shinkansen booking, loading more stored value onto a Suica or ICOCA does not buy the intercity reservation. With SmartEX, you first pay for the Shinkansen booking through the registered credit card and may assign an IC card to enter the gate; the Shinkansen fare is not deducted from its stored balance. Assign the correct credential for each separately ticketed family member and follow the ticket or QR alternative if you have not assigned a card. A child occupying a reserved seat requires the applicable purchased child ticket. See our guide to buying Shinkansen tickets for the booking steps. SmartEX IC boarding guide (checked September 24, 2026).
There is an important exception to the shorthand “IC balance never pays for a Shinkansen.” JR East’s Touch de Go! Shinkansen lets eligible riders use stored value for eligible nonreserved Shinkansen segments in its specified operating area; its Welcome Suica Mobile instructions identify area and train exclusions. It is not the Tokyo–Osaka Tokaido booking described above. More generally, some limited express journeys need an additional express or seat ticket even when an IC card can cover the basic fare. JR East ticket overview (checked September 24, 2026).
Five checks before the first train
- Count the paying riders and reserved seats, including any seat for a child under six.
- Bring age ID for a named child card; confirm the seller for the product you want.
- Check the IC acceptance logo on each local rail or bus service and purchase separate intercity tickets.
- Confirm your card’s expiry and refund rules before adding a large balance.
- For a prebooked Shinkansen, match each rider’s ticket to the correct card, QR code or paper ticket.
For a broader family route after the card choice, see Hidden Gems in Japan with kids and our 10-day hidden Japan family itinerary.
FAQ
Will my Osaka ICOCA work on Tokyo trains?
Yes, on participating Tokyo-area IC networks; JR West lists mutual use with Suica and PASMO areas. Check the individual operator when the route is unusual or regional. It does not buy a Tokyo–Osaka Shinkansen reservation by itself. JR West eligible areas (checked September 24, 2026).
Does a seven-year-old need a child card?
They need a child fare, obtained either with a correctly issued child card on eligible services or with an appropriate child ticket. An ordinary adult card deducts an adult fare. Bring the child’s proof of age for card issuance. JR East Suica, JR West child ICOCA (checked September 24, 2026).
Does a four-year-old need a card or a reserved-seat ticket?
On applicable JR journeys, an accompanied four-year-old can usually ride without a separate paid seat or IC card, subject to companion limits. If you want the child to occupy a reserved seat, book the applicable child ticket. Check the particular service’s rules. JR East FAQ, JR Central infant and reserved-seat conditions (checked September 24, 2026).
Can all family members share a card at the gate?
Plan one appropriate fare medium for each person who must pay; a single stored-value card is not a reusable group pass at automatic entry and exit gates. Keep the named child card with its child. JR East card usage, PASMO named-card conditions (checked September 24, 2026).
Can I tap all the way from Tokyo to Osaka on one IC balance?
No. Compatible local areas are not one continuous stored-value journey. Book the intercity ticket separately; SmartEX can let you tap with a linked card after payment. A limited JR East Touch de Go! service for specified other Shinkansen segments is a distinct exception. JR East area restriction, SmartEX boarding, JR East Touch de Go! (checked September 24, 2026).
Hidden Gems Japan Editorial Team