Term Dates and the School Year in Japan: A Guide for Parents
Japan runs two different school calendars side by side: the Japanese national April-to-March year and the August or September to June year followed by most international schools. Understanding this mismatch is essential for planning a move.
Quick answer
How the Japanese school year compares to international school calendars in Japan, and what the April vs September mismatch means for arrival timing and transfers.
At a glance
- Country: Japan
- Sections: 16
- Questions answered: 8
- Read time: 11 min read
Two calendars, not one
One of the more confusing things about the school system in Japan is that there isn't a single national school calendar that applies everywhere. The Japanese national school system, covering the vast majority of Japanese public and many private schools, runs its academic year from April to March. Most international schools operating in Japan, by contrast, follow the northern-hemisphere pattern common internationally, starting in August or September and finishing the following June or July.
This means that, depending on which type of school your child attends, you could be looking at entirely different start dates, holiday periods, and end-of-year timing. It's an easy detail to overlook when planning a relocation, but it has real practical consequences, so it's worth understanding clearly before you finalise your moving dates.
Why the two calendars run out of step
The April-to-March structure of the Japanese national school year reflects Japan's broader fiscal and administrative calendar, which also runs April to March across government and much of the corporate sector. International schools in Japan, on the other hand, generally align their calendar with the academic year used by the curricula they teach (British, American, IB or others), which is typically organised around an August or September start, partly to stay consistent with sister schools or accrediting norms elsewhere in the world, and partly to make transfers to and from other international schools abroad more straightforward.
Because neither system is likely to change to match the other, families in Japan should expect this mismatch to be a permanent feature of planning around schooling, not a temporary quirk.
What this means for arrival timing
If your family has flexibility over when you relocate to Japan, arriving in time for the August or September start of the international school calendar generally gives you access to the widest number of available places, since that is when the greatest number of planned admissions happen across most grade levels at most schools. Arriving at other points in the year is entirely possible, but generally means a narrower set of available places, since schools have fewer, if any, planned intake points outside their normal start of year.
If your relocation is tied to the Japanese fiscal or academic year instead, for example because a partner's employer or visa process is structured around an April start, you may find your arrival lands awkwardly relative to the international school calendar. In that case, contact prospective schools early to understand realistic availability for a mid-year start at your child's specific grade level, rather than assuming a place will simply be available when you need it.
What this means for transfers between systems
A family whose child needs to move between the Japanese national system and an international school at some point during their time in Japan, in either direction, should think through timing carefully. A transfer that looks simple on paper, moving schools between one year and the next, can be complicated in practice if the two calendars aren't aligned, since a child might otherwise face a term or more of overlap or gap between leaving one system and starting the other.
Contact both the sending and receiving school directly and as early as possible if this kind of transfer is a realistic possibility for your family, and ask specifically how they've handled similar transfers before, since general assumptions about a smooth handover can be misleading given the calendar mismatch.
Typical structure of the international school year in Japan
Most international schools in Japan divide their August or September to June academic year into two or three terms or semesters, with breaks that generally align in broad terms with the school's home curriculum tradition: a longer summer break, and shorter breaks around the winter holidays and in spring. Exact dates, and the length of each break, vary meaningfully by individual school, so always check a specific school's own published calendar rather than assuming a standard pattern applies uniformly across all international schools in Japan.
Typical structure of the Japanese national school year
The Japanese national school year generally runs from early April to late March the following year, divided into three terms, with the first running roughly from April to July, the second from around September to December, and the third from January to March. Japan's national school system also has a distinctive summer break that is somewhat shorter than the long summer holiday typical of many Western school calendars, along with shorter breaks around the winter and spring term transitions. Families considering a Japanese national school for their child, whether alongside or instead of an international school, should check exact dates directly with the specific school or local board of education, since some regional variation exists.
Public holidays and how they interact with the school calendar
Japan observes a number of national public holidays throughout the year, and schools, both Japanese national schools and international schools, generally close on these days. Some public holidays cluster together in ways that create informal extended breaks, most notably the period known as Golden Week in late April and early May, which can affect both the Japanese national school calendar and, depending on the specific school, some international school calendars as well. Check a specific school's calendar for how it treats these clustered holiday periods, since practice can vary.
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How employer relocation timing can clash with school timing
Many employers plan relocations to Japan around business needs, such as a project start date or an internal transfer date, rather than around the school calendar, which can create tension for families with school-age children. If you have any ability to influence your relocation date, raising the school calendar mismatch early in discussions with your employer or relocation provider can help align a move with a more favourable school entry point, even if it's only a matter of shifting by a few weeks.
Planning a mid-year arrival
Planning around Japan's dual school calendars
- Most international schools start in August or September; the Japanese national system starts in April
- Arriving for the international school year start generally means the widest choice of places
- A mid-year arrival is workable but usually means fewer available places
- Transfers between the Japanese national system and an international school need extra timing care
- Always confirm exact dates directly with the specific school, since calendars vary
If a mid-year arrival is unavoidable, given your visa timeline, housing situation, or employment start date, focus your school search on understanding realistic mid-year availability at your shortlisted schools as early as possible, ideally before you finalise other aspects of your move. Some schools are more accustomed to mid-year admissions than others, and asking directly about a school's experience and track record with mid-year starts, rather than just its stated policy, can be a useful way to judge how smoothly a transition is likely to go for your child.
Term dates and the IB Diploma or A-level timeline
For families with a child on a two-year Diploma Programme or A-level pathway, the calendar mismatch has an added dimension worth considering: starting or transferring partway through one of these programmes is generally more disruptive than starting at the beginning of a school's normal academic year, given the sequential, cumulative nature of coursework at this level. If your move coincides with the middle of your child's Diploma or A-level years, contact both schools well in advance to assess whether a smooth transition is realistic, and what, if anything, might need to be repeated or adjusted.
Requesting a specific school's calendar
Because term dates, holiday lengths, and the exact treatment of public holidays vary between individual schools even within the same city, always request a specific school's own published academic calendar as part of your research, rather than relying on general patterns described in a guide like this one. Most schools publish this on request during the admissions process, and it's a reasonable, and important, document to review before finalising your family's moving dates.
How this fits into your wider relocation planning
Term dates and calendar timing are just one part of a wider set of relocation decisions families need to coordinate when moving to Japan with children, alongside housing, visas, and the school application process itself. Our guides to how to apply and moving to Japan with children cover these related areas in more detail.
A planning framework for aligning your move with the school calendar
Working backwards from a target term start
- Confirm the specific school's actual start-of-year date, not a generic international school assumption
- Allow a buffer of at least a few weeks between arrival and term start where possible
- If your move date is fixed, tell prospective schools early so they can advise on realistic entry points
- Factor in visa processing and residence registration timing, which can affect enrolment steps
- Revisit the plan if your move date shifts, and notify schools promptly of any change
If your relocation date has any flexibility, it helps to work backwards from the school calendar rather than forwards from a preferred moving date. Start by identifying your target school's actual start-of-year date, then work backwards to allow time for residence registration, settling into housing, and any final school assessments, giving yourself a buffer of at least a few weeks before term begins rather than arriving the day before school starts. If your move date is fixed by external factors such as a visa timeline or employment start date, work in the other direction: identify what that fixed date means for realistic school start options, and communicate this clearly and early to any school you're applying to, so they can advise on genuinely available entry points rather than a theoretical best case.
How the calendar mismatch affects families with children in both systems
Some families have children split between an international school and the Japanese national system, whether by choice or because of differing entry points, and this arrangement makes the calendar mismatch particularly visible day to day, since holidays, term breaks and even the length of the school year itself will differ between siblings. If this applies to your family, plan household routines, family holidays, and childcare arrangements around both calendars simultaneously rather than assuming they'll align, and build some flexibility into family travel plans since a break that suits one child's school calendar may fall in the middle of term for the other.
Caveats on using this guide to plan your move
The general calendar patterns described in this guide, including the April-to-March and August-to-June structures and typical holiday clustering, hold broadly across Japan, but exact dates, the length of specific breaks, and how clustered holiday periods like Golden Week are treated can vary meaningfully between individual schools and between regions. Use this guide to understand the overall shape of the mismatch and the kinds of questions worth asking, but always confirm exact dates directly with a specific school before finalising travel bookings, visa timing, or a moving date, since general patterns described here are not a substitute for a school's own published calendar.
Building calendar checks into your school shortlist process
As you shortlist schools, add each one's academic calendar to your comparison alongside curriculum, fees and location, rather than treating it as a detail to check only after a school is chosen. A school with an otherwise strong fit but a calendar that clashes badly with a fixed relocation date, or with a partner's own school-age children's calendar if attending a different school, may be less workable in practice than a slightly less ideal school with better calendar alignment, so weigh this factor early rather than as an afterthought once other decisions are already made.
Frequently Asked Questions
Does Japan's school year run April to March or August to June?
Both, depending on the type of school. The Japanese national system runs April to March; most international schools follow an August or September to June calendar.
When is the best time to arrive in Japan for school admissions?
If you have flexibility, arriving in time for the August or September start of most international schools generally gives access to the widest number of available places.
Can my child start an international school in Japan mid-year?
Often yes, but availability is generally more limited than at the start of the academic year. Contact schools early to check realistic mid-year options for your child's grade level.
Is Golden Week a school holiday in Japan?
The cluster of public holidays known as Golden Week in late April and early May affects both the Japanese national calendar and, depending on the school, some international school calendars. Check the specific school.
How long is the summer break for Japanese national schools?
Japan's national school summer break is generally shorter than the long summer holiday common in many Western school calendars, though exact dates vary by region and should be confirmed locally.
Will transferring between a Japanese school and an international school be disrupted by the calendar mismatch?
It can be, since the two systems' term structures don't align. Contact both the sending and receiving school early to plan the timing carefully.
Do all international schools in Japan use the same term dates?
No, exact term dates and holiday lengths vary by individual school even within the same city. Always request a specific school's published calendar.
Is starting mid-way through the IB Diploma or A-levels a problem?
It can be more disruptive than starting at the beginning of the programme, given the sequential nature of coursework. Discuss feasibility directly with both the sending and receiving school.
International schools in Tokyo
- Aoba-Japan International School
- Canadian International School Tokyo
- Clarence International School Tokyo
- Columbia International School
- Deutsche Schule Tokyo Yokohama
International schools in Osaka
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