How does Japan choose its IBO team?

Students take a computer-based preliminary in July, about 80 go to a four-day residential final round in August with practical exams, and about 12 candidates sit a team selection exam in March. The result is four team members plus two reserves. This comes from the official 2026 pages in Japanese, so it rests on our translation.

Who organises the Japan Biology Olympiad?

The Japan Biology Olympiad Committee (国際生物学オリンピック日本委員会) organises it, with its secretariat at the Japan Science Foundation in Tokyo. The IBO lists the committee and the foundation as the national contacts.

The 2026 notice says students under 20 who are not yet in university or other higher education. Non-Japanese students must be enrolled in a school in Japan. Students in their third year of high school or above could not become team candidates for the following IBO.

Is this guide written by a Japanese participant?

No. It is an outline of the official picture from published sources, with tips from BiOGuide. We are looking for a Japanese olympiad participant or coach to write a firsthand guide and replace this one.

Japan Biology Olympiad (JBO): Official Outline of the Path to IBO

Japan sends four students to the International Biology Olympiad (IBO), with two reserves. According to the national committee’s own results pages, the 2026 team won one gold, two silver and one bronze medal at the IBO in Vilnius, Lithuania (12 to 19 July 2026), and the 2025 and 2024 teams each won four silver medals.⁴ This page outlines how the path to that team works according to the sources we could read. It is a map of the structure, not an insider’s account of what the exams feel like. The official pages are in Japanese, so most details below rest on our own translation.

Programme: Japan Biology Olympiad (JBO), in Japanese 日本生物学オリンピック, run by the Japan Biology Olympiad Committee, established 2005 according to the IBO¹
Organiser: 国際生物学オリンピック日本委員会, with its secretariat at the Japan Science Foundation, Tokyo²
Who can enter: Students under 20 who are not in higher education; non-Japanese students must attend a school in Japan³
Stages: Preliminary, final round, team selection exam, IBO team of four plus two reserves
Official website: jbo-info.jp
Language: Japanese for the national exams; the IBO itself is in English

The path at a glance

Stage	What happens	How sure we are
Preliminary	A 90 minute computer-based multiple choice theory test in July; about 80 advance	Good for the 2026 cycle (our translation)
Final round	A four-day residential camp in August with practical exams modelled on IBO problems	Good for the 2026 cycle
Team selection exam	About 12 candidates sit an exam in March; the result is four members plus two reserves	Medium: the date on the page is inconsistent
IBO team	Four students and two reserves	Good: the official results pages agree on four

Stage 1: the preliminary

For the 2026 cycle the preliminary was held on 12 July 2026 as a 90 minute computer-based, camera-monitored multiple choice theory exam in Japanese, with textbooks, web search and generative tools banned.³ Online registration ran from 1 May to 15 June 2026 and the entry fee was 2,000 yen.³ The official home page reports that 1,929 students sat it, and about 80 advanced.^2,3 Eligibility is described in the glance box and the FAQ above. The fee is a point for an author, below.

Stage 2: the final round

The final round for 2026 was held from 18 to 21 August 2026 at Osaka Metropolitan University, residential for three nights, with 80 students attending.³ It consists of practical laboratory exams modelled on IBO problems plus research-experience events, and awards are given at the end of the camp.³ The notice states that lodging and meals are provided and the round is free, while travel is paid by the student. It also says students in the third year of high school or above in summer 2026 could not become candidates for the following IBO team, so only students in the second year or below go forward to team selection.³

Stage 3: the team selection exam

From the final round, about 12 eligible candidates are chosen for a team selection exam held at the Science Museum in Tokyo, and the result is four team members plus two reserves, based on this exam and the final round results.³ The exam is free, and travel is reimbursed under rules stated in the notice.³ The date is a point for an author, below.

Stage 4: the IBO team

Four students and two reserves are named each year, and the committee’s results pages for 2024, 2025 and 2026 list the team and its medals.⁴ The 2026 team is described there as having received a commendation from the Minister of Education, Culture, Sports, Science and Technology. The sources we could read do not describe the training the team receives before the IBO.

Points for an Author

If you went through this programme yourself, these are the points we most need you to settle. They are grouped here so that nothing uncertain is buried in the text above.

Where the sources disagree

The stages. The IBO’s directory describes three rounds: a paper theory exam from May to July with about 4,000 students, a practical round in August for about 80, and a theory round in January or February for about 15 at the Japan Science Foundation.¹ The committee’s 2026 pages describe a July computer-based preliminary with 1,929 candidates, an August camp and a March team selection exam of about 12.³ The IBO page looks out of date, so this guide follows the committee.
The team selection date. The 2026 notice gives 14 March 2027 in its body text but 15 March 2026 in a menu entry.³ We followed the body text, which is the only date that fits the cycle.
The entry fee. The 2026 notice gives 2,000 yen for the preliminary,³ while the committee’s FAQ says there is no exam fee.⁵ The FAQ appears to describe the programme’s older name, Biology Challenge, and is likely stale.
The dates of the 2025 IBO. The committee’s index page gives 13 to 18 July 2025 and the 2025 results page gives 20 to 27 July 2025.⁴ We could not resolve this, so we give no date for it.

Gaps a firsthand author could fill

What the preliminary and the practical exams are actually like, and how they compare with the IBO.
How the four members and two reserves are chosen from the team selection exam and the final round.
Whether and how the team is trained before the IBO, and who pays for it.
How the IBO papers are handled for Japanese students, since the FAQ we read mentions an accompanying teacher but appears dated.
What students wish they had known, and how the path feels outside the big cities.

A firsthand author can settle every one of these points. If that could be you, email us or read how it works.

BiOGuide tips for students aiming at this path

These are general tips from BiOGuide, not advice from a Japanese participant, and they apply to any student aiming at an IBO team.

Train for the international format early. The IBO papers are in English and test reasoning on data and experiments, not only recall. The IBO preparation guide explains the format, and past IBO papers are in our practice papers.
Practise the practical side. The Japanese final round is built around practical exams modelled on IBO problems, so learn the lab techniques as well as the theory. Our notes on practical skills are a start.
Build the core theory. Work through cell and molecular biology, animal physiology and genetics first.
Learn the English terms. Even if you study in Japanese, learn the English names of structures, processes and methods, because the IBO papers are written in English.
Use the official channels for anything dated. Registration windows, fees and exam dates change every year. The committee’s site decides, not us.

Official links and sources

International Biology Olympiad, country page for the Japan Biology Olympiad Committee. ibo-info.org. The page is undated and looks out of date in places, so we use it only for background.
Japan Biology Olympiad Committee, home page and committee page (in Japanese, our translation). jbo-info.jp and committee page.
Japan Biology Olympiad Committee, notice for the 2026 cycle (in Japanese, our translation). jbo-info.jp/jbo/jbo2026.html
Japan Biology Olympiad Committee, IBO results pages for 2026, 2025 and 2024 (in Japanese, our translation). These are the committee’s own reports; we found no independent confirmation of the medals.
Japan Biology Olympiad Committee, FAQ page (in Japanese, our translation, probably out of date). jbo-info.jp/faq.html

We found no government or news page for Japan that we could open, so every Japan figure here comes from the committee or the IBO.

This outline was last checked on 8 October 2026 and will age. Spotted an error or out-of-date detail? Email r6394175@gmail.com.