The 31st
International Biology Olympiad 2020
Sasebo City, Nagasaki, Japan

Date: July 3rd, 2020 (Fri) to July 11th, 2020 (Sat)
Venue: Nagasaki International University, Sasebo City, Nagasaki


IBO Challenge 2020 Memorial Movie


IBO Challenge 2020 Results

IBO2020 in Nagasaki is cancelled due to the COVID-19 global pandemic. 
Instead, we are hosting a remotely-conducted competition (IBO Challenge 2020) in August-October, 2020. 


Message from the IBO2020 Organizing Committee 

I am very proud to announce that we are holding the IBO2020 competition in Sasebo, Nagasaki. Nagasaki is a historical and memorable place, as it is the last place that experienced an atomic bomb attack. Nagasaki is surrounded by a beautiful sea with hundreds of islands, where you can enjoy numerous marine organisms. Immersed in nature, we are sure that all the delegates will spend a wonderful time with friends from all over the world. We warmly welcome you all with some new challenges including an international group work activity. In addition, of course, you will enjoy our scientific tasks. 

Looking forward to seeing you all in July 2020. 


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IBO2020 Overview (Cancelled)

Official Name
The 31st International Biology Olympiad 2020 Nagasaki, Japan

July 3rd, 2020 (Fri) to July 11th, 2020 (Sat) – 9 days

Nagasaki International University, Sasebo City, Nagasaki

After evaluating both practical and theoretical exams, students within approximately the top 10% scores will receive gold medals; the next 20% and 30% will respectively receive silver and bronze medals.

Secretariat of the 31st International Biology Olympiad 2020 Nagasaki, Japan
Kagurazaka 3-1, Shinjuku City, Tokyo 162-8601 JAPAN
Phone: 03-5228-8286

Please use the address below for general inquiries and mailing:

Tokyo University of Science Building No.1, 13th floor, 
Kagurazaka 1-3, Shinjuku, Tokyo 162-8601
Phone: 03-5228-8286

Japonica Species Guide

Introducing species with "japonica" in their names!

Hover your cursor to read the description.

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Delisea japonica

Delisea japonica

No.21 Tamaitadaki

Delisea japonica is a species of red macroalgae called “Tamaitadaki” in Japan. The body of this species is flat, crimson, has alternating branches, and is up to 25 centimeters tall. After fertilization, a capsule-like fruit body called a cystocarp containing diploid spores can appear at the end of a branch. Found along the central and southern coasts of Honshu island in Japan, it resides on submarine rocks in the tidal zone. Currently, Delisea japonica is considered synonymous with the species Delisea pulchra, which is found in Australia, New Zealand, the Antarctic Peninsula, and the islands of the Subantarctic.

Notholca japonica

Notholca japonica

No.34 Type of Rotifer

Notholca japonica is a species of tiny aquatic invertebrate called a rotifer. Rotifers are important sources of food for fish, copepods, comb jellies, and jellyfish. Many are microscopic, feature bilateral symmetry, and have two wheels of cilia called a “corona” that help them to locomote or gather food. Notholca japonica is a marine species, and has been found in the Sea of Japan and the Sea of Okhotsk. This species is approximately 185-205 micrometers long and is translucent with red and orange internal organs. Species in the genus Notholca are known for their presence in Holocene-era sediments in Antarctica.

Meyersia japonica

Meyersia japonica

No.30 Type of Nematode

Meyersia japonica is a marine species of an elongated, tubular organism called a nematode. Nematodes live in aquatic environments or within water found in soil. They are highly adaptable, can be found in almost any habitat on Earth, and are important players in global nutrient cycles and in maintaining sediment stability. Meyersia japonica range in length from 5-7.5 mm and have three teeth. Like others in the family Oncholaimidae, Meyersia japonica is not parasitic but rather free-living in nature, primarily consuming diatoms and algae.

Cryptomeria japonica

Cryptomeria japonica

No.17 Japanese Cedar

Cryptomeria japonica is a well-known and heavily planted species of evergreen conifer in Japan. They grow up to 50 meters tall, have peeling, reddish-brown bark, and aromatic blue-green needles. It is widespread in mountain forests in Japan and is cultivated in China. Rot-resistant and workable, its wood has historically been used to make buildings, bridges, ships, and furniture. The Japanese island of Yakushima is famous for its ancient Cryptomeria japonica trees, including one that is estimated at between 2,000-7,000 years old. Japanese cedars are infamous for producing pollen that is a major cause of hay fever in Japan.