What Age Is aChild in Japan?

How many of the 395 age rules change at each age, 0 to 20
30
71
162
323
244
25
946
197
8
9
110
111
8212
1713
14
5515
1316
17
6318
219
520
03
17
216
332
424
52
694
719
80
90
101
111
1282
1317
140
1555
1613
170
1863
192
205

There is no single answer. Of the 395 age rules a family meets on a trip to Japan, some rule changes at 17 different ages between birth and 20, and the busiest edges are 6, 12 and 18, the edges of Japanese school.

By Josh Hinshaw Updated
Research Study
What the study found

So the useful question is never “what age is a child in Japan”, but “what age is my child for this ticket”.

Is a 12-year-old a child or an adult on Japanese trains?

Both, depending on the ticket. JR Central keeps a pupil on a child fare until they leave elementary school, so a sixth grader who has already turned 12 rides on the child fare. The Japan Rail Pass makes a 12-year-old an adult, even in elementary school, unless it was bought online and paid for while the child was 11. Of the 82 rules in the study that change at 12, 63 follow the school year rather than the birthday.

Can a 2-year-old fly on my lap within Japan?

On some airlines. JAL and Skymark carry a child under 3 on a lap. ANA, Jetstar Japan, Peach and Spring Japan stop at under 2, so a 2-year-old needs a seat of their own. Japan’s departure tax also starts at age 2.

When do children stop getting in free?

Most often at 6. Of the 112 attractions read, free entry ends when a child starts school at 41 of them and at 4 years old at 22. Age 6 is the busiest edge of all: 94 rules in 11 areas change there, from trains and buses to hotels, baths and attractions.

Until what age can a child share our hotel bed for free?

It depends on the hotel, and the answer runs from 3 to 19. Of 47 hotel and chain rules, 20 end free bed-sharing when a child starts school, 10 at the end of elementary school and 8 at 13.

Can my daughter come into the men’s bath with her father?

Up to a point. In 9 of the 10 public-bath rules read, a child may not enter the bath of the other sex from age 7. Below 7 the ordinances read do not bar it, though a bath can set its own limit; from 7, a parent alone with a child of the other sex needs a private bath or a second adult.

Does my child need a car seat in Japan?

Under 6, yes, in a private or rental car: it is the law, and the duty sits with the driver. Taxis and buses are exempt, so a taxi may not have one.

Are there rules for teenagers out at night?

Yes. Osaka asks parents to keep children under 16 in from 8 pm, Tokyo asks the same for under-18s from 11 pm, and arcades must keep under-18s out from 10 pm. No one under 20 may enter a smoking area, even without smoking.

How do we plan around all of this?

Plan with each child’s age on the day they travel or visit (a Japan Rail Pass bought online goes by the payment date), and for a child near 6 or 12, check whether the rule follows the birthday or the school year. Across the ruler, 230 rules have at least one school-year edge and 157 follow the birthday alone.

Method

How we measured this

Data collected
Data date: rules as published, read in September and October 2026.
Sample
395 age rules a family meets, reused by key from LuNi's filed datasets: 190 from transport, lodging, bath, tax, smoking, curfew, street and park rules and 205 from the attraction census (112 venues)
Sources read
10
Last updated
October 2026

We took every age rule from LuNi’s own research and set them on one ruler: 190 rules from rail, bus, ferry, flight, IC card, car, hotel, hotel pool, ryokan, bath, park, tax, smoking, curfew and street rules, plus 205 entry rules at 112 attractions. Each comes from the issuer’s own page (eight through dated archive copies), and the age we give is our reading of the issuer’s words. We read the sources in September and October 2026. This is the set of rules a family meets on a typical trip, not every age rule in Japan: rules we have not researched yet are not on it.

Sources

  1. JR Central: passenger fare rules for children (Japanese)railway.jr-central.co.jp/ticket-rule/rule06.htmlCentral Japan Railway Company · Read October 2026
  2. Japan Rail Pass: pricesjapanrailpass.net/en/purchase/price/Japan Rail Pass (JR Group) · Read October 2026
  3. JAL: infants and children on domestic flights (Japanese)jal.co.jp/jp/ja/dom/support/smilesupport/baby.htmlJapan Airlines · Read October 2026
Further sources 7
  1. ANA: traveling with children on domestic flights (Japanese)ana.co.jp/ja/jp/guide/reservation/support/domestic/fa…All Nippon Airways · Read October 2026
  2. National Tax Agency: the international tourist tax (Japanese, PDF)nta.go.jp/publication/pamph/kansetsu/kanko/pdf/01.pdfNational Tax Agency · Read October 2026
  3. e-Gov: Road Traffic Act (Japanese)laws.e-gov.go.jp/api/1/lawdata/335AC0000000105Digital Agency (e-Gov law search) · Read October 2026
  4. Gunma Prefecture: the public bath ordinance and mixed bathing (Japanese)pref.gunma.jp/page/207625.htmlGunma Prefecture · Read October 2026
  5. Osaka Prefecture: youth ordinance (Japanese)pref.osaka.lg.jp/houbun/reiki/reiki_honbun/k201RG00000487.htmlOsaka Prefecture · Read October 2026
  6. Ministry of Health, Labour and Welfare: smoking areas and under-20s (Japanese)jyudokitsuen.mhlw.go.jp/people/Ministry of Health, Labour and Welfare · Read October 2026
  7. LuNi's own filed study datasets, each row keyed to its source record (rail, bus, ferry, flight, IC card, car, hotel, hotel pool, ryokan, bath, park, tax, smoking, curfew, street and attraction rules)LuNi Research (S01, S13, S14, S17, S22, S23, S26 and others) · 395 rules from 284 issuer pages on 225 hosts; each row names its source dataset and the issuer page behind it · Read September to October 2026
Every source used in this study 284
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princehotels.co.jp 5/kioicho/faq//parktower/facility/spa_fitness//parktower/faq//takanawa/faq//tokyo/faq/

web.archive.org 5/web/20260210204033id_/https://www.kotsu.metro.tokyo…./web/20260712093957id_/https://www.apahotel.com/custo…/web/20260827130110id_/https://www.viainn.com/family//web/20260830012312/https://www.kyotorailwaymuseum.jp…/web/20261002212754/https://www.tokyodisneyresort.jp/…

imperialhotel.co.jp 4/j/osaka/fitness/index.html/osaka/faq/stay/tokyo/facility-access/fitness-spa/tokyo/faq/stay

jreast.co.jp 4/mobilesuica/kiyaku/database/icrule01.html/mobilesuica/kiyaku/database/welcome_suica_mobile.html/mobilesuica/kiyaku/database/welcomesuica.html/woman

hotelmonterey.co.jp 3/ginza/stay/room/2.html/grasmere_osaka/stay/room/125.html/kyoto/stay/room/142.html

jal.co.jp 3/jp/ja/dom/reservation/child//jp/ja/dom/support/baby/child-seat.html/jp/ja/dom/support/smilesupport/baby.html

jr-odekake.net 3/icoca/purchase/icoca.html/railroad/service/children.html/railroad/service/train-woman.html

laws.e-gov.go.jp 3/api/1/lawdata/323AC0000000122/api/1/lawdata/335AC0000000105/api/1/lawdata/414AC0000000103

onsen-kusatsu.com 3/gozanoyu/faq/

onsen-kusatsu.com 3/ohtakinoyu/faq//sainokawara/faq/

rihga.co.jp 3/osaka/fitness/swimming/index.html/kyoto/fitness//osaka/forchildren/

teamlab.art 3/jp/e/kyoto//jp/e/planets//jp/e/tokyo/

ana.co.jp 2/ja/jp/guide/reservation/domestic/fare-detail//ja/jp/guide/reservation/support/domestic/family/

artaquarium.jp 2/faq//time_price/

city.asahikawa.hokkaido.jp 2/asahiyamazoo/generalinformation/d052849.html/science/06/p002414.html

city.kyoto.lg.jp 2/gyozai/page/0000249302.html/kotsu/page/0000240682.html

cupnoodles-museum.jp 2/ja/yokohama//ja/yokohama/guide/admission/

dogo.jp 2/onsen/asuka/onsen/honkan

hankyu-hotel.com 2/hotel/dh/dhtokyo/contents/refacilities/hotel/respire/osaka/contents/family

hkdballpark.com 2/family-guide/game//ticket/stadiumtour/

hotel-east21.co.jp 2/faq//garden_pool/

jetstar.com 2/jp/ja/help/what-do-i-need-to-know-about-travelling-w…/jp/ja/kodomoto

jrwest-hotels.jp 2/granvia-kyoto/pool//granvia-osaka/lp/family/

jsf.or.jp 2/en/visit//guide/

kagakukan.sendai-c.ed.jp 2/access//qa/

kaitaku.or.jp 2/faq//userguide/

kaiyukan.com 2/info/group//info/ticket/kaiyukan/

keioplaza.co.jp 2/guide/children//guide/pdf/guide_skypool_agreement.pdf

kenko-station.metro.tokyo.lg.jp 2/category2/kitsuen/index.html/category2/kitsuen/kodomojourei.html

kidzania.jp 2/guide/faq/membersite/reserve/fee?shop_cd=1

kinugawaonsenhotel.com 2/conditions/en/spa/

miyakohotels.ne.jp 2/tokyo/facilities/beauty/01.html//westinkyoto/facilities/workout/

mlit.go.jp 2/kankocho/content/001747987.pdf/kankocho/ryokan/list_ja.html

newotani.co.jp 2/group/pools/tokyo//tokyo/stay/guide/

nta.go.jp 2/publication/pamph/kansetsu/kanko/pdf/01.pdf/publication/pamph/shohi/menzei/201805/pdf/0026006-15…

pasmo.co.jp 2/condition//en/tourist-pasmo/

policies.env.go.jp 2/national-garden/shinjukugyoen/guide/information//national-garden/shinjukugyoen/guide/rule/

pref.osaka.lg.jp 2/houbun/reiki/reiki_honbun/k201RG00000487.html/o050040/zei/alacarte/osakafunoshukuhakushisetsunishu…

railway.jr-central.co.jp 2/ticket-rule/cjr-regulation/_pdf/000044977.pdf/ticket-rule/rule06.html

sand-museum.jp 2/faq//information/

skymark.co.jp 2/ja/fare/ch.html/ja/reservation/children.html

sumida-aquarium.com 2/about/price//faq/

tokyo-skytree.jp 2/inquiry/faq//ticket/

tokyuhotels.co.jp 2/cerulean-h/fitness/index.html/osaka-e/qa/index.html

umigatari.jp 2/joetsu/faq//joetsu/info/

yoshiike.org 2/faq//provision/

yunessun.com 2/?stt_lang=en/service/faq/

arima-royal.jp 1/faq/

arimaspa-kingin.jp 1/kin-01.htm

art-play.or.jp 1/ttm/info/

asaya-hotel.co.jp 1/faq/

aura-tachibana.com 1/faq/

biopark.co.jp 1/info/admission/

bosenkan.co.jp 1/pdf/accommodation-terms202601.pdf

choice-hotels.jp 1/?faq_widget_open=true

churaumi.okinawa 1/guide/info/

chusonji.or.jp 1/

city.beppu.oita.jp 1/sangyou/onsen/konyokuseigen.html

city.fukuoka.lg.jp 1/zaisei/zeisei/life/syukuqa.html

city.himeji.lg.jp 1/dobutuen/0000007495.html

city.kobe.lg.jp 1/z/shikaijimukyoku/giann_etc/r6/2gatsukaigikekka.html

city.kumamoto.jp 1/kiji00358018/index.html

city.matsuyama.ehime.jp 1/kurashi/download/kenko/hokensho/seikatueisei/kankyou…

city.nikko.lg.jp 1/soshiki/6/1027/4/1826.html

city.sapporo.jp 1/shimin/pirka-kotan/shisetsu/index.html

city.sendai.jp 1/zoo/information/1-guide.html

citybus-osaka.co.jp 1/howto

daikannon.com 1/

dinosaur.pref.fukui.jp 1/guide/fee.html

e-zofukuoka.com 1/teamlabforest/

edmont.metropolitan.jp 1/faq/

edowonderland.net 1/price

england-hill.com 1/price/

files.jetstar.com 1/api/public/content/gk_fare_table_26

flypeach.com 1/lm/ai/airports/special_support/pregnant

fujiko-museum.com 1/english.html

fujisan-climb.jp 1/faq/

gero-ogawaya.net 1/terms/

geroyamagataya.com 1/faq/

glover-garden.jp 1/guide/

grandbach.co.jp 1/ginza/faq/

gunma-kodomonokuni.jp 1/playground/

hakoneyuryo.jp 1/qa/

hama-midorinokyokai.or.jp 1/zoo/zoorasia/fee.php

hanamusubi.co.jp 1/faq/

higashiyama.city.nagoya.jp 1/01_annai/01_01kaien

himeji-machishin.jp 1/ryokka/kokoen/guidance/index.html

himejicastle.jp 1/

hoshinoresorts.com 1/jp/sp/family/

hotel-chinzanso-tokyo.jp 1/stay/kid_friendly/

hotel-livemax.com 1/information/

hotel.kyoto 1/okura/facility/fitness/

hotelkeihan.co.jp 1/kyoto/guestroom/4/

hotelmets.jp 1/sys/mets_faq.cgi

hotespa.net 1/dormyinn/guide/faq.html

ikebukuro.metropolitan.jp 1/stay/guide/

inasayama.info 1/260401_kaitei/

intercontinental-strings.jp 1/jp/faq

inuyama-castle.jp 1/guidance/

iwayabetto.com 1/top.html

jaf.or.jp 1/common/safety-drive/protect-life/child-seat

japanrailpass.net 1/en/purchase/price/

jp.ch.com 1/rules-children

jr-central.co.jp 1/news/release/_pdf/000044710.pdf

jr-miyajimaferry.co.jp 1/fare/

jyudokitsuen.mhlw.go.jp 1/people/

kahaku.go.jp 1/riyou/nyukan-annai/

kamogawa-seaworld.jp 1/price_ticket/admission/

kanazawa21.jp 1/data_list.php?g=7&d=1

kate.co.jp 1/guide/

kegon.jp 1/info/

keihan.co.jp 1/traffic/safety/womenonly.html

keisei.co.jp 1/keisei/tetudou/goriyo/pdf/keisei_260314.pdf

kidsplaza.or.jp 1/info/

kobe-kagakukan.jp 1/

kobe-maritime-museum.com 1/price/

kobe-ojizoo.jp 1/guide/hour_charge

kobe-port-tower.com 1/ticket/

kobeherb.com 1/infomation/hours_fare/

kobesuma-seaworld.jp 1/guide/price_ticket/

kodomonokuni.org 1/price/

kotoku-in.jp 1/

kotononiwa.jp 1/clause.html

kouhou.pref.gifu.lg.jp 1/gougai/pdf/21101201.pdf

kyoto-towerhotel.jp 1/faq/

kyuhaku.jp 1/visit/visit_top.html

legolanddiscoverycenter.com 1/tokyo/tickets-passes/

limousinebus.co.jp 1/ja/guide/terms/caution/

lottecityhotel.jp 1/faq/

marine-world.jp 1/general-guide/regular-fees/

marinepia.or.jp 1/info/

marunouchi.metropolitan.jp 1/stay/guide/

matsue-castle.jp 1/userguide/index

matsuyamajo.jp 1/guide/

mesm.jp 1/other/accommodation-policy.html

miraikan.jst.go.jp 1/visit/admission/

monkeypark.jp 1/

motherfarm.co.jp 1/ticket/index.php

museum.toyota.aichi.jp 1/visit/admission.html

my-kagawa.jp 1/ritsuringarden/feature/ritsuringarden/guide

nagasaki-kagakukan.jp 1/guide/

nagasakidejima.jp 1/about

nagashima-onsen.co.jp 1/resort/fee/ticket_list.html

nagoyaaqua.jp 1/fee/

nagoyajo.city.nagoya.jp 1/info/fee/

nankai.co.jp 1/traffic/woman.html

ncsm.city.nagoya.jp 1/visit/visitors_guide/admission.html

nijo-jocastle.city.kyoto.lg.jp 1/admission/fee/

nonhoi.jp 1/information/

okimu.jp 1/guide/information/

om-faq-zd.osakametro.co.jp 1/api/v2/help_center/ja/sections/32265588062233/articl…

ooyaji.jp 1/

osaka-angenet.jp 1/konjyakukan/guide

osakacastle.net 1/guide/

osakastation-hotel.jp 1/files/pdf/conditions_for_accommodation.pdf?20261001

oya909.co.jp 1/access/

palacehoteltokyo.com 1/evianspa/fitness/

parkhoteltokyo.com 1/ja/faq/

penguin-aqua.jp 1/price/

pref.gunma.jp 1/page/207625.html

pref.hokkaido.lg.jp 1/fs/7/9/5/4/1/2/3/_/%E5%85%AC%E8%A1%86%E6%B5%B4%E5%A0…

pref.kanagawa.jp 1/docs/e8z/cnt/f762/legionella_2022kaisei.html

pref.kyoto.jp 1/reiki/reiki_honbun/a300RG00000341.html

pref.miyagi.jp 1/site/shukuhakuzei/

pref.oita.jp 1/soshiki/13900/kousyuuyokujyo-kaisei-r3.html

pref.tochigi.lg.jp 1/e07/r3jyoureitoukaisei.html

railway-museum.jp 1/information/

route-inn.co.jp 1/faq/

rph.co.jp 1/faq/

sapporo-olympicmuseum.jp 1/

seiburailway.jp 1/safety/cooperationrequest/womenonlycar/index.html

seikatubunka.metro.tokyo.lg.jp 1/documents/d/seikatubunka/kenzenikusei_jourei20241011

sekisuitei.com 1/faq/

sendai-astro.jp 1/access/

shibaparkhotel.com 1/faq/

shibuya-scramble-square.com 1/sky/_next/static/chunks/pages/faq-0789ea8d16df729c.js

shikisainooka.jp 1/about/guide/

shiro-niwa.pref.ishikawa.lg.jp 1/kenrokuen-garden/info.html

shiroikoibitopark.jp 1/facility/counter.html

shiunso.co.jp 1/faq/

shokoku-ji.jp 1/kinkakuji/access/

soumu.go.jp 1/main_content/000758653.pdf

southerntower.co.jp 1/rooms/faq/

ssc.slp.or.jp 1/guide/

subway.osakametro.co.jp 1/guide/fare/various_fares/child_fare/josya-ryokin_chi…

suimeikan.co.jp 1/provision/

suizenji.or.jp 1/guide/

superhoteljapan.com 1/en/otoku/family-use/

suzukacircuit.jp 1/park/fee/

t-doitsumura.co.jp 1/hour-fee/

takinoreien.com 1/pages/107/

tax.metro.tokyo.lg.jp 1/shitsumon/leisure/general_01

tempozan-kanransya.com 1/tempozan-kanransya.com/

tennojizoo.jp 1/info/outline/

theokuratokyo.jp 1/ja/frequently-asked-questions/

tobezoo.com 1/info/admission.html

tobu.co.jp 1/railway/women/skytree_line/

tobuhotel.co.jp 1/levant/faq/

tobuws.co.jp 1/ticket

tokyo-joypolis.com 1/ticket/index.html

tokyo-zoo.net 1/ueno/visitor-info/tickets/index.html

tokyometro.jp 1/safety/attention/women/index.html

tokyostationhotel.jp 1/faq/

tokyotower.co.jp 1/fee/

tokyu.co.jp 1/railway/woman/

tokyustay.co.jp 1/faq/

toshogu.jp 1/pages/25/

toyoko-inn.com 1/feature/service_policy/

trip-kamakura.com 1/facility/detail.php?id=56

tv-tower.co.jp 1/pricetime.html

tyo-nrt.com 1/en/flow

uenofarm.net 1/%e5%96%b6%e6%a5%ad%e6%a1%88%e5%86%85/

uminomori.jp 1/umino/info/

vessel-hotel.jp 1/faq/

wakatakenosyou.co.jp 1/price/index.html

wakayamafarm.com 1/

washington.jp 1/faq

web.pref.hyogo.lg.jp 1/kf14/konnyoku.html

yunosato-y.jp 1/index.html

zao-fox-village.com 1/information

zuihoden.com 1/info/

zuihouen.net 1/faq/

How to cite this study

Cite as: LuNi Travels, "What Age Is a Child in Japan?", October 2026, https://lunitravels.com/what-age-is-a-child-in-japan/