Free travel for a young child or infant does not include a free reserved seat of their own. JR East requires the child fare and applicable charges when either uses an individual reserved seat. For an ordinary reserved seat on a Shinkansen or limited express, check the child basic fare plus the child reserved-seat limited-express charge, not just a seat supplement. The Green Car charge is the same for adults and children, so halving the adult Green Car journey total is not the correct method.[22][23][24]
Classify the traveller before deciding about the seat
JR East distinguishes adults, children, young children and infants. Adults are generally aged 12 or over, but a 12-year-old elementary-school pupil remains in the child category. Children are generally aged 6 to under 12, but a six-year-old who has not yet entered elementary school remains a young child. Young children are generally aged 1 to under 6, and infants are under 1.[22] The familiar shorthand 'under six free, under twelve half price' therefore leaves out important conditions, particularly around the sixth and twelfth birthdays.
Our advice: make a passenger list showing age on the travel date, relevant schooling, accompanying travellers and whether each child needs a separate seat on each leg. This guide checks JR East's published ordinary-ticket guidance; it does not promise identical treatment by every railway, discounted package or booking product. All three sources were checked on 20 September 2026. No clear publication or revision date was displayed in the retrieved bodies, so publication is recorded as unknown. The check date is not a claimed commencement date for the rules.
At ages six and twelve, do not automatically substitute an overseas school grade
The official age page includes a qualification often lost in summaries: 'elementary school' means a school established under Japan's School Education Act, and 'elementary-school pupil' means a pupil at such a school.[22] The page does not supply a conversion table for overseas education systems or establish that a twelve-year-old attending any institution called a primary school automatically qualifies for a child ticket. This limitation matters to visitors whose home-country school starting ages and grade names differ from Japan's.
Our advice: if the traveller is six and has not started school, twelve and still in elementary education, or in an overseas system that does not map clearly to the published definition, ask the official seller before selecting a fare category. Give the date of birth, travel date and school circumstances, and ask what documentation is required. Do not assume that a passport, student card or particular school letter is guaranteed to resolve the question: the checked page does not set out those acceptance procedures. A booking form offering only adult and child buttons is not itself a complete eligibility rule.
A separate reserved seat triggers more than a seat-only supplement
JR East says young children and infants normally travel free, but child fares and charges are required when they individually use a reserved seat, a Green seat other than in a non-reserved Green Car, a berth or similar accommodation.[22] Individual use of the seat is the issue here, not whether the child is travelling without an adult. Having a parent in the next seat does not make the child's own reserved seat free. An infant under one is expressly included in this reserved-seat condition.[22]
The ticket guide distinguishes the basic-fare ticket from the limited-express ticket required for Shinkansen and limited-express travel; the two can also be printed together on one ticket.[24] For a normally free accompanying young child who will have an ordinary reserved seat on such a train, check both the child basic fare and the applicable child reserved-seat limited-express charge.[22][24] Our advice: tell the seller explicitly that the child needs their own reserved seat, and check the full travel section. Do not buy only an express supplement on the assumption that the underlying journey remains free, and do not use the number of pieces of paper as proof that all necessary components have been covered.
Without a separate reserved seat, count the accompanying young children
Another condition applies when more than two young children accompany one adult or one child: child fares and charges are required from the third young child onward.[22] The wording includes an accompanying traveller in the paid child category, not only an adult parent. It also specifically counts young children, rather than saying that infants and all other under-sixes must be combined into a single two-person limit. A young child travelling alone is separately listed as requiring child fares and charges.[22]
Applying those conditions, one adult with three young children still triggers a charge for the third even if none needs an individual reserved seat. One adult with two young children also needs to pay for a young child who uses a reserved seat of their own.[22] Our advice: test the accompanying-person count first, then test each child's seating arrangement. Do not work backwards from the number of seats you intend to reserve and assume that this must also be the number of payable passengers. Ask the seller to confirm complicated groups rather than treating the free allowance as a freely transferable family discount.
Ordinary child fares: check components rather than halve the checkout total
JR East states that child basic-fare, limited-express, express and reserved-seat tickets are half the adult amount, with a five-yen remainder discarded; it also expressly notes that there are cases where the half-price treatment does not apply.[22] This is a general rule for the listed ticket types, not a promise that every discounted adult package, optional service or final order total can be divided by two. Which components are needed depends on the train and accommodation: the ticket guide identifies a basic fare and reserved-seat limited-express ticket for a Shinkansen reserved-seat journey.[24]
Our advice: obtain the official child quotation for the same date, section and train, and check the basic fare and applicable express or seating component separately. The term 'reserved-seat ticket' does not mean that an extra standalone seat ticket must always be added on top of a reserved-seat limited-express ticket. Equally, do not add the entire adult order together and apply your own rounding afterwards. This guide deliberately gives no fixed yen total for your route because your section, travel date and sales product have not been verified. A numerical example without those conditions would create a misleading budget rather than a reliable quotation.
Green Car charges are not reduced to the child rate
The age page says Green Car, GranClass and sleeper tickets cost the same for adults and children. The Green Car page independently confirms equal adult and child Green charges and says Green tickets for limited-express or express trains should be bought together with the corresponding express ticket.[22][23] For a child using a limited-express Green reserved seat, therefore, check the applicable child basic fare and express charge, then the Green charge without a child half-price reduction. Do not halve the adult all-in Green Car total.
A young child or infant using an individual Green reserved seat first meets the child-fare-and-charges condition, while the Green component remains subject to the adult-equal rule.[22][23] The age page expressly excludes non-reserved Green Cars from that particular individual-Green-seat condition; this is not proof that every use of a non-reserved Green Car is free, and it must not be used to reinterpret a Shinkansen Green reserved seat.[22] Our advice: identify the actual train and accommodation when requesting a quotation. This article does not attempt to establish the detailed young-child seating rules for ordinary-train non-reserved Green Cars, private compartments or other special accommodation.
Three family examples: establish liability before comparing comfort
Example one: two adults and a four-year-old want an ordinary reserved seat for the child. Although the accompanying-young-child count is within the free allowance, individual reserved-seat use triggers child fares and charges. Example two: one adult accompanies three young children aged two to five, none requesting a separate reserved seat; the third-young-child condition still applies. Example three: two adults reserve a Green seat for an infant under one; the individual-seat condition and the adult-equal Green charge both need to be applied, rather than assuming a half-price Green supplement.[22][23]
Our advice: separate 'eligible to accompany us without paying under these conditions' from 'we prefer to pay for a definite seat of the child's own'. Whether an adult can comfortably hold a child on a long journey, and whether the child needs room to rest, are family planning decisions, not exceptions to fare liability. Do not budget on a apparently empty reserved seat being free to use. We have not checked live availability and do not promise that an uncharged young child can occupy any empty-looking reserved seat. If you change your mind during the journey, ask staff to arrange the applicable tickets before assuming that only a small seat-only difference will be due.
Before paying, verify the child's ticket and the child's seat separately
Fare category, necessary ticket components and the actual train-seat assignment are separate checks. The official ticket guide says a non-reserved limited-express ticket is only for non-reserved cars and identifies some trains that have reserved seating only.[24] A child's non-reserved express ticket is therefore not permission to use any train or any unoccupied seat. Paying the child basic fare alone also does not establish that the requested reserved seat has been booked.
Our advice: check every passenger's age or schooling category, payment trigger, travel section, date, train, accommodation and seat number before completing the purchase. Confirm the child and accompanying adult are placed as you need them to be; this article does not guarantee adjacent-seat availability. If the booking interface cannot represent an infant needing a seat, an unusual school-age case or a complicated accompanying group, ask the official seller rather than entering an invented age to get past the screen. Keep the actual seller confirmation. These steps are a decision method grounded in published guidance, not a guarantee about every reservation website, discount product or railway company's practice.
Before departure
- Check age on the travel date and the school-age qualifications at six and twelve; do not automatically equate overseas school grades.
- Mark every young child or infant needing an individual reserved seat and check their child fare and applicable charges.
- Check the charge from the third young child accompanying one adult or child; do not overlook the headcount condition.
- For ordinary reserved seats, check basic fare and applicable express/seating charges without omitting or duplicating components.
- Treat the Green charge as equal to the adult charge, not as half of the adult all-in Green ticket total.
- Verify travel section, train, accommodation and the child's seat; ask the official seller about special products and school-age edge cases.
Sources & freshness
Sources accessed 20 September 2026. Numbers identify sourced facts; unnumbered planning steps are editorial advice, not operator promises. Recheck prices, availability, sales rules and operating status before travelling.
- [22] JR East — Adults and children ↗
- [23] JR East — Green Car tickets ↗
- [24] JR East — Ticket types and purchase guide ↗
Applies to: Japan; specific services and routes are defined in the article. Source publication dates and exact scope are stated in the article; an undated page is not a permanent guarantee. Article published and sources verified: 2026-09-20. Service effective dates are not page publication dates.
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