Japan's 6-3-3-4 School System: The Five Tiers Explained
Japan's 6-3-3-4 school system is the legal ladder every child resident in Japan climbs through: six years of elementary school, three years of junior high school, three years of high school, and four years of university.1 The first nine years are compulsory by statute, and the cutoff dates, the compulsory scope, and the alternative tracks that branch off this ladder shape decisions a family makes long before choosing a specific school.
Procedures, fees, and requirements can change. Confirm current details at the Ministry of Education, Culture, Sports, Science and Technology (MEXT) website.
Overview
The School Education Act fixes a set of institution types in Article 1: kindergarten, elementary school, junior high school, compulsory education school, high school, secondary education school, special needs education school, university, and college of technology (kōsen).1 The "6-3-3-4" shorthand names the standard course durations, in years, of the four sequential general-track tiers that make up the main path: elementary school, junior high school, high school, and university.1
This ladder's structure applies to every child resident in Japan, regardless of nationality.12 One nuance runs through the whole system: the legal obligation to attend the compulsory nine years binds Japanese-national guardians specifically, while foreign-national children are accepted into the same public compulsory-education schools, tuition-free, as a matter of national policy.2 The Compulsory Education section below states where that line sits; the day-to-day enrollment procedure that follows from it is a separate, more detailed topic.
This structure is set by national statute, not municipal discretion, so it is uniform whether a family lives in Tokyo or a rural prefecture.13 Regional differences in how many kōsen or senshū gakkō seats are available nearby are a supply question covered elsewhere, not a change to the structure mapped here.
The Five Tiers of Japanese Education
The four sequential general-track tiers, plus the compulsory line that splits them, are summarized below.1
| Tier | Japanese term | Ages | Standard duration | Compulsory |
|---|---|---|---|---|
| Elementary school | 小学校 (shōgakkō) | 6–12 | 6 years | Yes |
| Junior high school | 中学校 (chūgakkō) | 12–15 | 3 years | Yes |
| High school | 高等学校 (kōkō) | 15–18 | 3 years | No (qualification-based entrance) |
| University | 大学 (daigaku) | 18–22 | 4 years (6 for medicine, dentistry, veterinary medicine, and clinical-track pharmacy) | No |
Shogakko: Elementary School, Ages 6-12
Elementary school runs 6 years, fixed in Article 32 of the School Education Act.1 Article 17(1) requires a guardian to enroll their child "from the first school year that begins on or after the day following the day that the child reaches six years of age," continuing until the school year in which the child turns 12.1
The school year itself runs April 1 to March 31 of the following year, set by the Regulation for Enforcement of the School Education Act (as of 2026-07; confirm current figures with MEXT).4 This date lives in a ministerial ordinance, not the Act itself, so it is treated here as subject to change even though it has held for over a century in practice.
The phrase "reaches six years of age" is the part most secondary sources get wrong. Under the Act on Calculation of Age together with Civil Code Article 143, a person's age legally increases at the end of the day before their birthday, not on the birthday itself.5
Combined with the April 1 school-year start, this produces a counterintuitive result: a child born April 1 enters school a full year earlier than a child born just one day later, on April 2 of the same calendar year. The table below works through both cases.
| Birth date | Legally turns 6 | First eligible school year | Enters elementary school |
|---|---|---|---|
| April 2, 2019 | End of April 1, 2025 | Year starting April 1, 2026 | April 2026, with children born April 2, 2019 through March 31, 2020 |
| April 1, 2019 | End of March 31, 2025 | Year starting April 1, 2025 | April 2025 (one year earlier), with children born April 2, 2018 through March 31, 2019 |
The net effect: the school-year cohort runs from April 2 of one year through April 1 of the next, not "age 6 by April 1" in the loose sense often repeated online.15 A child born April 1 is the oldest possible member of the earlier cohort, not the youngest member of their own birth year.
This is also the statutory basis for 早生まれ (hayaumare, "early-born"): children born January through early April who are the youngest in their assigned cohort.5
Chugakko: Middle School, Ages 12-15
Junior high school runs 3 years, fixed in Article 47.1 Article 17(2) mirrors the elementary-school pattern: guardians must enroll a child who has completed elementary school starting the first school year after that completion, continuing until the school year in which the child turns 15.1
Together, elementary and junior high school make up the 9-year compulsory core described in the next section.
Koko: High School, Ages 15-18
High school runs 3 years, fixed in Article 56.1 Entrance is qualification-based rather than obligation-based: Article 57 sets who may enroll (a junior-high graduate, a compulsory-education-school graduate, or a person of deemed-equivalent scholastic ability), and nothing in the Act imposes a guardian's duty to enroll a child the way Articles 16 and 17 do for elementary and junior high school.1
Continuation from junior high school is high but is a measured statistic, not a legal requirement. 98.8% of junior-high graduates advanced to high school overall in the FY2020 survey, including full-time, part-time, and correspondence courses (as of 2020 survey);6 98.7% advanced in the FY2023 survey (as of 2023 survey).7
MEXT publishes this figure annually as part of its School Basic Survey (学校基本調査, Gakkō Kihon Chōsa);8 check the latest release for the current year's number rather than treating either figure above as fixed.
Daigaku: University, Ages 18-22
University runs 4 years, fixed in Article 87(1).1 Medicine, dentistry, and veterinary medicine run 6 years instead, as do pharmacy courses whose principal purpose is developing clinical practical ability, per Article 87(2).1
The Act states university's purpose as broadly imparting knowledge, teaching and researching specialized arts and sciences in depth, and developing intellectual, moral, and practical abilities.1 (Article 83)
Advancement to higher education generally, meaning university, junior college, kōsen, and specialized training colleges combined, was 85.4% in the FY2025 survey, down 1.1 percentage points from the prior year (as of 2025 survey, published 2025-12-26).9
The 85.4% figure spans university, junior college, kōsen, and specialized training colleges together. It is broader than a university-only enrollment rate and should not be read as one.9
Compulsory Education: The Nine-Year Core
Article 26 of the Constitution obligates guardians to "have all boys and girls under their protection receive ordinary education as provided for by law," and states that "such compulsory education shall be free."3
The School Education Act implements this as a 9-year obligation split across the elementary and junior-high tiers above. Article 16 states it directly: "Custodians have the obligation to have their child receive a nine-year general education, as prescribed in the following Article."1
This obligation is nationality-specific in a way that is easy to miss. It binds Japanese-national guardians under Articles 16 and 17;1 foreign-national children are not personally subject to it, but are accepted into the same public compulsory-education schools, tuition-free, as a matter of policy grounded in international human-rights covenants.2
The enrollment mechanics that follow from this distinction for foreign-resident families, including how a ward office handles the paperwork, are a separate, more detailed topic beyond this structural map.
What "compulsory" means in practice
The obligation runs to the guardian (保護者, hogosha), not to the child. Articles 16 and 17 both frame the duty as the custodian's.1
"Free" has been interpreted narrowly by the courts. A 1964 Supreme Court ruling held that requiring parents to bear public elementary school textbook costs does not violate Article 26(2), because "free" refers specifically to tuition, not to every education-related expense.10
Textbooks are nonetheless free in practice, through a separate 1963 statute rather than the Constitution itself: the Act on Free Distribution of Textbooks for Compulsory Education Schools.11
Costs outside tuition and textbooks, school lunch fees, supplies, uniforms, and similar items, are not covered by either the constitutional guarantee or the textbook statute and remain a family expense.10
Post-Compulsory Tiers: Optional by Statute, Universal in Practice
Both high school and university sit outside the Article 16 and 17 compulsory-education obligation. Entry to each is qualification-gated, Article 57 for high school, equivalent secondary-completion requirements for university, rather than obligation-driven the way elementary and junior high school are.1
In practice, continuation to high school clusters at 98.7% to 98.8% across the 2020 and 2023 surveys cited above (as of the 2020 and 2023 surveys; confirm current figures with MEXT).76 This is why the tier is often described as optional in name only.
The two facts are not in tension. MEXT's continuation-rate statistic measures an outcome; the Act's qualification-only entrance rule states a legal requirement, and the two describe different things.176
Nothing in the statute treats high school or university attendance as legally mandatory. A continuation rate in the high 90s percent range still leaves a nontrivial minority of students who do not continue.1
Alternative Tracks Within the Ladder
Four tracks branch off the standard koko-then-daigaku path: vocational high school, kōsen, senshū gakkō, and the Open University of Japan. Availability of kōsen and senshū gakkō seats varies by region, a supply question for a more specific article, not a change to the structure below.
The diagram below shows where each track enters and exits the main ladder.
Vocational high school
A vocational high school is a course type (学科, gakka) within the high school tier, not a separate rung on the ladder. It sits alongside the general course (普通科, futsūka) and, since a 1993 amendment, the integrated course (総合学科, sōgō gakka), which lets students choose electives from both the general and vocational curricula rather than committing to one track.12
| Course type | Japanese | Description |
|---|---|---|
| General course | 普通科 (futsūka) | Standard academic curriculum |
| Vocational course | 専門学科 (senmon gakka) | Subject-specific track (commercial, technical, agricultural, and similar) |
| Integrated course | 総合学科 (sōgō gakka) | Electives drawn from both general and vocational curricula |
A vocational high school course still counts as the same 3-year koko tier under Article 56. Senshū gakkō, covered below, is a structurally separate category of school under the Act.113
Kosen: the five-year technical college
Kōsen (高等専門学校) exist "to teach specialized and advanced subjects deeply and to develop the abilities necessary for occupations," per Article 115.13 The standard course runs 5 years; merchant-marine-related departments run 5 years and 6 months.13 (Article 117)
Entrance requires the same qualification as high school entrance: junior high school completion or deemed-equivalent scholastic ability, under Article 118.13 Kōsen is entered directly after chūgakko, around age 15, as an alternative to koko plus part of daigaku, not as something layered on top of high school.
Senshu gakko: vocational schools
Senshū gakkō (専修学校) exist to develop abilities necessary for an occupation or for practical life, or to improve general knowledge, through organized education.13 (Article 124) The Act divides them into three course types, each with its own entrance requirement, summarized below.13 (Article 125)
| Course | Japanese | Entry requirement |
|---|---|---|
| Higher course | 高等課程 (kōtō katei) | Junior high school completion |
| Specialized course | 専門課程 (senmon katei), commonly 専門学校 (senmon gakkō) | High school completion |
| General course | 一般課程 (ippan katei) | None fixed |
This keeps senshū gakkō distinct from kōsen. Kōsen is a single 5-year program entered after junior high school; senshū gakkō's post-secondary course is entered after high school, with different entrance points and credentials that do not overlap.113
The Open University of Japan
放送大学 (Hōsō Daigaku), the Open University of Japan, is an accredited university under School Education Act Article 1, established under MEXT approval per the Act and related university-establishment standards. It sits at the daigaku tier, not as a separate category.14
It is legally a private university, not a national or public one. The operating body, the Open University of Japan Foundation, is established under the Open University of Japan School Corporation Act, whose Article 3 designates it a school corporation (学校法人, gakkō hōjin) under the Private School Act.14
Instruction is delivered by broadcast plus in-person sessions at study centers nationwide, making it a distance-learning route into the daigaku tier for any resident, including foreign residents.14 This research does not establish outcomes data specific to foreign-resident students.
The broadcast-plus-study-center model can fit around work or relocation schedules that make a standard 4-year campus daigaku impractical.14
Good to know
Kosen is entered after junior high school, not after high school
Kōsen and koko share the same entrance qualification, junior high school completion, and both are entered around age 15. Kōsen is an alternative chosen at that point, not a step taken after finishing high school.13
"Age 6 by April 1" oversimplifies the actual school-entry rule
The precise mechanism turns on the Act on Calculation of Age: a child's age legally increases at the end of the day before their birthday, not on the birthday itself. This is what pulls a child born April 1 into the cohort of children born the previous year, one year ahead of a child born just one day later on April 2.5
Compulsory education is tuition-free, not expense-free
The constitutional "free" guarantee has been judicially confirmed to mean tuition-free only. Textbooks are free through a separate 1963 statute, but school lunch fees, supplies, uniforms, and similar costs are not covered by either and remain a family expense.1110
A near-99% continuation rate does not make high school mandatory
Continuation rates in the 98.7% to 98.8% range (as of the 2020 and 2023 surveys; confirm current figures with MEXT) do not change the statutory fact that high school entrance is qualification-based, not obligation-based like elementary and junior high school.176
Senshu gakko and kosen are not the same alternative track
Both sit outside the standard koko-then-daigaku path, but they differ in entry point and credential. Kōsen is a single 5-year program entered after junior high school; senshū gakkō's post-secondary course is entered after high school.13
See also
- Welcome to J-Compass: A Long-Term Resident's Guide to Living in Japan
- Jūminhyō: Japan's Residence Record Explained
- Koseki: Japan's Family Register Explained