The Complete Guide to International Baccalaureate (IB): Understanding PYP, MYP, and DP, Subject Selection, and University Admission [2026 Edition]

The International Baccalaureate (IB: International Baccalaureate) is an international educational programme offered by the International Baccalaureate Organization (IBO), established in Geneva, Switzerland in 1968. It has been adopted by approximately 6,000 schools across more than 160 countries worldwide, and in Japan, more than 200 schools have received IB programme accreditation, including 75 DP (Diploma Programme) authorized schools (as of June 2025).

The IB comprises three programmes: PYP (ages 3–12), MYP (ages 11–16), and DP (ages 16–19). Upon completing the final DP course, you obtain an internationally recognized university entrance qualification accepted by more than 20,000 universities across 100 countries worldwide. The DP is evaluated on a maximum of 45 points: 6 subjects × 7 points plus 3 core points, with a world average of approximately 30 points.

"I've heard the IB is demanding," "Is it right for my child?" "How does it differ from other curricula like A-Level or AP?" — For those with such questions, this article provides a comprehensive explanation covering the IB's full scope, subject structure, evaluation system, university admission, a list of IB-accredited schools in Japan, and even "alternative options if IB doesn't work out."

The International Baccalaureate (IB) — An Educational Programme Recognized Across 160 Countries Worldwide

The International Baccalaureate (IB) was originally developed for the children of expatriate staff attending international schools in Switzerland, creating an internationally recognized entrance qualification that would allow them to pursue university education upon returning to their home countries.

More than 50 years since its establishment, the IB has grown into one of the world's largest international educational programmes, adopted by approximately 6,000 schools in more than 160 countries. In Japan too, the Ministry of Education, Culture, Sports, Science and Technology (MEXT) actively promotes the expansion of IB programmes, and the number of accredited schools continues to increase year after year.

The IB's Educational Philosophy — Not "What You Know," but "How You Learn"

The most significant difference between the IB and education in many countries is that it prioritizes the quality of learning approaches over the quantity of knowledge.

The IB establishes the "Learner Profile" with ten attributes: inquirers, knowledgeable, thinkers, communicators, principled, open-minded, caring, risk-takers, balanced, and reflective. This philosophy runs consistently through all three programmes (PYP/MYP/DP), and rather than memorizing "correct answers," students practice "formulating questions and conducting inquiry". This approach defines IB education.

The Three IB Programmes — How PYP, MYP, and DP Work and Connect

The IB is divided into three programmes according to age.

PYP→MYP→DP: Consistent Philosophy, Progressively Increasing Difficulty

The three programmes are connected by a common educational philosophy of "inquiry-based learning," but the transition from MYP to DP marks a sharp increase in difficulty. Up to MYP, schools have considerable discretion and flexibility, but upon entering DP, students face world-standardized external examinations and extensive written assignments. This "discontinuity" represents the IB's greatest challenge (discussed further below).

It should be noted that schools offering all three programmes are called "IB continuum schools," but many schools offer only PYP, only MYP, or only DP.

For detailed information on each programme, please see our dedicated articles.

The DP Structure — Six Subjects + Three Core Requirements = 45 Points Maximum

The DP is the final stage of the IB and directly leads to obtaining a university entrance qualification. Here we explain the DP structure at an overview level.

Six Subject Groups

Students select one subject from each of the following six groups. Of these, three subjects are taken at HL (Higher Level) and three at SL (Standard Level). HL classes provide approximately 1.5 times more instructional hours than SL, with correspondingly deeper content.

The Three Core Requirements (TOK, EE, CAS)

In addition to the grades in six subjects (7 points × 6 subjects = 42 points maximum), the DP includes three mandatory core requirements called "the core," which can add up to 3 points to your total score.

The total is 45 points maximum. A score of 24 or above is the minimum requirement to earn the IB Diploma. However, failure to complete CAS means the diploma will not be awarded regardless of your score.

Subject selection strategies (Mathematics AA vs. AI, subject combinations by target university programme), concrete tactics for TOK/EE/CAS, and detailed information about IA (internal assessment) are explained in depth in the following articles.

IB Scores Explained — What Score Do You Need to Apply to Which University?

Score Ranges and What They Mean

Recommended IB Scores for World and Japanese Top Universities

Important Note: Most universities accept applications based on "Predicted Score," not final examination results. This means that from the moment you begin the DP, every assignment and test directly affects your university applications. For details on how Predicted Scores work and strategies for university applications, please see the article below.

The IB and Other International Curricula (A-Level and AP) — Key Differences

It is important to understand that the IB is not the only international curriculum available. The world's major university entrance qualifications include, besides the IB, A-Level (British system) and AP (American system).

The IB DP is widely considered to have the most demanding workload in terms of "volume" (6 subjects + core requirements), but in return, students develop broad knowledge and strong inquiry skills. If you wish to concentrate on just three subjects, A-Level is an option; if you primarily aim for American universities, AP is also worth considering.

For a detailed comparison, please refer to our comprehensive guide.

For more information on A-Level, please see the article below.

For more information on AP, please see the article below.

Why Is the IB Considered "Demanding"? — The MYP-to-DP Transition Gap and Common Challenges

"I've heard that the final two years of the IB (DP) are so busy you barely sleep," "I heard some students drop out because there's too much work," "Isn't the IB too challenging for students from non-English-speaking backgrounds?" — We receive many such concerns at ELT.

To be clear, it is a fact that the IBDP is one of the most demanding high school curricula in the world. However, this "difficulty" has clear structural reasons, and with understanding and preparation, it is entirely manageable.

The "Gap" Between MYP and DP

The primary reason many students struggle in the DP is the significant difficulty gap between MYP and DP.

Through MYP, schools have considerable autonomy, and learning takes place in a relatively relaxed atmosphere. Many schools operate with their own evaluation standards. However, upon entering the DP, students suddenly face rigorous external examinations unified globally, a 4,000-word academic essay (EE), a philosophical essay (TOK), and documentation of extracurricular activities (CAS).

This "temperature shock" strikes students unprepared, and it is not uncommon for panic to set in during the final two years of high school.

Two "Invisible Walls" Facing Students in Japan

For families in Japan, in addition to the DP's inherent difficulty, two further obstacles emerge.

Wall ①: The Shift from "Memorization of Correct Answers" to "Inquiry-Based Learning"

Japanese education centers on "memorizing the correct answers that teachers provide," whereas the IB is built on Inquiry-Based Learning. Students are constantly asked: "Why do you think that formula works?" "What is another perspective on this historical event?"

If students enter the DP with a "please tell me the correct answer" mindset, they struggle to construct their own arguments (Argument) in TOK and EE, resulting in lower grades.

Wall ②: Insufficient CALP (Cognitive Academic Language Proficiency)

The belief that "I speak English fluently in everyday conversation, so I'll be fine" is a major misconception. What the IB demands is CALP (Cognitive Academic Language Proficiency)—sophisticated language ability for cognitive and academic purposes.

"Speaking English with friends" and "explaining photosynthesis in English" are entirely different skill sets. When CALP is insufficient, students find themselves in the unfortunate situation of "understanding the content but losing marks because I cannot express it in English." Essays in History and Economics require the ability to explain causal relationships logically, while Biology and Physics demand the skill to describe complex phenomena with precise definitions.

Steps to Take Now to Prevent Falling Behind

1. Become comfortable with "questions that have no single correct answer." Plant seeds of critical thinking by discussing news at home.
2. Build CALP (academic language) in advance. Pre-learn the specialized terminology and concepts of your chosen subjects in English.
3. Prepare during the MYP phase. Rather than waiting until just before the DP begins, gain experience in the inquiry cycle (question → investigation → presentation) during MYP.

If the IB Isn't the Right Fit: Transitioning to or Combining with A-Level, IGCSE, and AP

The IBDP is an excellent curriculum, but it is not a good fit for every student. The burden of six subjects plus core requirements may not suit you, you may prefer to concentrate on three specific subjects, or your DP Year 1 grades may prompt you to explore an alternative path. Let me clarify the options available in these situations.

Transferring to an A-Level School After MYP

Students can complete their MYP at an IB school and then transfer to an A-Level school (such as Harrow Appi or Rugby School Japan) instead of continuing to the DP. The inquiry-learning skills developed in MYP remain valuable in A-Level study. In particular, the A-Level EPQ (Extended Project Qualification) aligns well with the MYP Personal Project, making IB experience a genuine advantage.

The standard transfer window is until September of Year 12 (Grade 11). Transfers mid-Year 13 are not practical. In some cases, MYP eAssessment results are considered in A-Level school admissions, so maintaining strong MYP grades is important.

Switching to A-Level Mid-DP

This applies to students whose DP Year 1 (Grade 11) grades fall short and who are considering a switch to A-Level.

In practice, this means "pausing DP Year 1 and entering A-Level Year 12 from the beginning," which creates a high likelihood of losing one year of progress. The most realistic route is to make this decision within the first term of DP Year 1 (September–December) and join an A-Level school's Year 12 in September of the following year.

Another option is to continue DP through completion while simultaneously taking one or two A-Level subjects as a Private Candidate (independent exam taker) in a "DP + A-Level Supplement" strategy. By holding A-Level scores as insurance alongside the DP, your options for UK university applications expand.

Remaining at an IB School While Taking A-Level/AP as Independent Exams

Students can remain enrolled at their IB school and continue the DP while concurrently taking one or two A-Level subjects as a Private Candidate. Holding both IB and A-Level scores when applying to UK universities broadens your options.

For those aiming for American universities, taking the AP exam in addition is also possible. AP exams can be taken regardless of IB school enrollment and may qualify for university credit depending on the subject.

Detailed information on independent A-Level exam entry is covered in the article below.

Graduating with a Certificate Without Completing the Full DP

There is also an option to graduate without completing all DP requirements, instead obtaining only the subject results certificate (IB Course Results / Certificate). While no diploma is awarded, individual subject grades may be usable in applications to some universities.

However, "no diploma" is disadvantageous at most universities, so aim to complete the DP as a principle, and view the Certificate as a last resort.

What Matters in Every Case

Curriculum transition and combination strategies succeed or fail based on "application strategy design" even more than on subject learning itself." Questions like when to switch, how it affects university applications, and how to secure Predicted Grades or Predicted Scores require expert judgment. We strongly recommend seeking support from specialists with cross-curriculum expertise.

IB-Accredited Schools in Japan: Two Routes—International Schools and Japanese Schools

As of June 2025, 268 schools in Japan hold IB programme accreditation. The breakdown is: 80 PYP-accredited schools, 44 MYP-accredited schools, 75 DP-accredited schools, and 1 CP-accredited school. Schools offering multiple programmes (such as KIST, Aoba, and Seisen) are counted multiple times, so the actual number of unique schools is smaller.

IB schools in Japan fall into two broad categories: "International Schools" and "Japanese schools (Ittijō-kō—schools under the Japanese school system)."

International School IB-Accredited Schools (Examples of DP Providers)

Top IB Schools in Japan:

Japanese Schools (Ittijō-kō) with IB Accreditation

An increasing number of Japanese private and public schools are implementing the IB. Tuition is less than half that of international schools and is eligible for government subsidies under Japan's high school free education programme.

What is "Japanese-Language DP"? This is a system where certain DP subjects (such as mathematics and sciences) can be completed in Japanese, and final exams can also be taken in Japanese. This makes it possible to earn the IBDP even for those with concerns about English proficiency. However, it is important to note that when applying to overseas universities, the appeal of a Japanese-language DP differs from that of an English-language DP.

For a comparison of fees at Japanese-language DP and international school courses, please see the article below.

For general information on international school fees, please see the following.

How to Apply to Japanese Universities Using IB Scores

As of 2026, 82 universities (27 national, 8 public, and 47 private) are conducting entrance examinations that utilize IB scores. Of the top 10 Japanese universities in the world university rankings, nine national universities have adopted IB entrance exams, and the scope of IB score utilization in Japanese university admissions continues to expand annually.

Basic Flow of IB Entrance Examinations

Selection typically involves, in addition to the IB score, a short essay and an interview. Some universities may also require submission of an EE summary or a TOK-related report.

Applications often use the Predicted Score, so it is crucial to accumulate results on each assignment and test from the moment the DP begins.

For detailed information on post-IB pathways (overseas and domestic universities), please see the following article.

Tackling the IB with Expert Guidance—ELT's IB Support

The IBDP is said to be "the most rigorous high school curriculum in the world," and upon completion, students emerge with "remarkable critical thinking and skills that command respect from universities worldwide"—a truly exceptional programme.

At ELT, experienced IB specialists serve as your "DP Sherpa (guide)," accompanying you throughout the journey.

• Subject Instruction: Clear explanations of HL/SL subjects such as Math AA/AI, Physics, Chemistry, and Economics in English
• TOK/EE Support: One-to-one guidance from topic selection and brainstorming through essay structure review and citation rules
• Building CALP (Cognitive Academic Language Proficiency): Develop the academic English expression and logical reasoning skills required for IAs and TOK essays
• Curriculum Strategy: Comparative counselling on IB/A-Level/AP, guidance on IB-to-A-Level transitions, and application strategy design

Learn more about IB preparation →