The hidden costs of international school in Tokyo: school days, holidays and childcare budgets

When choosing a school, families often compare fees, curricula and the language environment carefully. The calendar may receive less attention until after enrolment. When children are on holiday but parents are working, who looks after them? Can you drop them off in the morning and collect them in the evening? What would a whole week cost?

For international-school families, a mismatch between school holidays and Japanese working days can mean extra annual leave, transport and childcare spending. Here we compare annual school days, holiday schedules and care costs across several types of Tokyo school, to see what families may need beyond tuition.

How many days are children actually at school?

Start with the full year. These figures concern scheduled school days across a complete academic year. They are not counts of 45-minute lessons, nor total annual teaching hours calculated from each day’s length.

The international-school estimates are approximately 173 days for Seisen Grade 1, 175 for Tokyo International School elementary, 177 each for Montessori School of Tokyo elementary and ASIJ, 178 for Aoba elementary, and 179 for BST. These figures show the broad scale of a full-year schedule; they are not an education-quality ranking.

Official public-school totals provide another reference. Across Koganei’s nine municipal elementary schools in 2026, Grades 1–4 have 199 days, Grade 5 has 199–200 and Grade 6 has 200. At Hachimanyama Elementary in Setagaya, Grades 1–4 have 198 and Grades 5–6 have 199. These Tokyo samples are around 200 days, not a nationwide standard.

Nor should private schools automatically be understood as offering more school days. The Tokyo private school cited here uses a five-day week and generally closes on Saturdays. Its approximately 190 days are a regulatory provision, not a calendar count that can be subtracted precisely from another school’s annual schedule.

These figures are not an exact, like-for-like ranking. Official public-school totals may include opening and closing ceremonies, events and shortened days. The international-school estimates count a half-day as one day; whether particular Saturday festivals are compulsory can also affect totals. Public-school years run from April to the following March, while some international schools run from August or September to June. Each comparison must cover a complete academic year.

Daily hours matter too. ASIJ’s Chofu campus normally runs from 08:00 to 15:00. At Minato’s Onarimon Elementary, the regular timetable ends at 14:30 on five-lesson days and 15:20 on six-lesson days. Annual day counts alone cannot establish teaching quality or tell a family how many childcare days it needs.

For working parents, the next question matters more: do their days off coincide with their child’s?

Autumn, winter and summer: where calendars diverge

Even within Tokyo, autumn 2026 schedules differ considerably:

An international-school autumn break therefore does not always mean one or two weeks. Public holidays should not be counted as days that differ from public-school schedules.

At year-end, BST finishes its term at midday on 11 December and ASIJ’s winter break starts on 12 December, while Kogai Elementary’s closing ceremony is on 23 December. Some international-school families consequently need daytime arrangements from mid-December, when local elementary schools are still open and parents have not usually started their year-end leave.

The summer mismatch can be longer. BST and ASIJ both publish June endings for their 2026–27 academic years. For comparison, Kogai Elementary’s ceremony before the 2026 summer break falls in mid-July. The number of weeks between them depends on the particular year’s calendars; it cannot be assumed to be the same everywhere.

Earlier holidays have advantages: families may avoid some Japanese peak periods, visit relatives abroad, travel or join camps elsewhere. Making use of that freedom still requires time and money.

Remote work may seem to make this easier, but working from home and looking after children all day both require attention. Lunch, activities and transport do not organize themselves just because the computer is on the dining table.

Can a child attend a public school for a few summer weeks?

International families do sometimes discuss spending part of an international-school summer break at a local Japanese elementary school, meeting peers and experiencing Japanese.

A child living overseas and returning temporarily to Japan may face different rules from a child already living in Japan and attending an international school who wants to use a long holiday at a nearby public school. Another family’s successful experience online does not guarantee the same route is available to yours.

Koganei’s rules, updated in April 2026, distinguish the two cases clearly. For children living overseas and returning temporarily, families can consult about formal transfer, normally for at least two weeks, contacting the city at least two weeks beforehand, subject to school circumstances. This is schooling, not a trial activity or childcare service. From the 2026 school year, Koganei does not accept holiday-based trial attendance by international-school students living in Japan.

That is Koganei’s rule, not a rule for all Japan. Ask your residential municipality’s board of education, explaining where the child lives, their current school and the intended length of attendance, then establish eligibility and procedures.

It is a route worth asking about. It is too early to put it into a household budget as a free summer-care plan.

Tuition classes, after-school care and camps: how much of a day is covered?

Holiday classes may be intended to reinforce academic subjects or simply to give children somewhere supervised to spend the day. These needs have very different prices and schedules. Rather than list providers, compare some common formats.

These are samples from published 2026 plans, including historical summer prices and autumn quotations. They illustrate scale, not market averages, current quotations or recommendations. A package’s calculated daily rate may not be available for individual-day bookings.

Coverage is easy to overlook. Academic tuition costing over ¥6,000 may last only 90 minutes. When a five-hour English camp finishes, parents may still be working. Once transport and extended care are added, an apparently cheaper choice may not fit a family’s working day.

For example, a five-hour English programme found in this review charged ¥56,500 for five days including materials and lunch, or ¥11,300/day. Extending its original 10:00–15:00 hours to 08:00–18:00 would have added ¥33,000 over five days under its published charges at the time: another ¥6,600/day. Ten-hour coverage would therefore cost close to ¥18,000/day.

Public gakudo’s monthly fee differs greatly from daily and session-based quotations, but it has its own admission conditions. International-school families can ask their ward, particularly whether care is available from the morning when only their child’s school is on autumn break and local public schools are open. A monthly fee does not guarantee full-day care throughout that break.

Put the school calendar beside the work calendar

Some days might be covered by a day camp, others by parents taking turns on leave; visits to relatives abroad or help from grandparents may be possible. Full-day care can cover days requiring uninterrupted work, while parks, libraries and friends can fill days when an adult has time. The right mix depends on a child’s age and adaptability as well as adults’ work flexibility.

Grandparents’ help does not appear on a provider’s bill, but it still involves travel costs, energy and practical arrangements. Using annual leave for school holidays can mean losing a later opportunity for real rest. These less easily priced contributions are part of the household cost too.

Public-school families also face these challenges. Summer and spring holidays and early-dismissal days require working parents to rearrange family life. Gakudo places, opening hours and whether children want to attend all matter. International-school families may face an additional mismatch between their school calendar and the rhythms of the surrounding society.

When choosing a school or planning next year, open the school calendar and parents’ work calendars together. Mark the working days that truly need extra care, then compare daily coverage, travel distance and total cost. That gives a more realistic household budget than simply counting holiday weeks.

For more holiday options, see Kodomo Go’s camps and short learning programmes. Confirm dates, admission conditions and places with the organizer.