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


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, 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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Perkeomeris japonica

Perkeomeris japonica

No.26 Type of Millipede

Perkeomeris japonica is a species of pill millipede and a member of the order Glomerida. Growing up to 6 mm long, these millipedes are black with reddish brown stripes, have eleven or twelve body segments covered by hard plates called tergites, and have 17-19 pairs of legs depending on sex. Like others in its order, Perkeomeris japonica can roll up into a ball when threatened and produce an odorous liquid that wards off predators. Widespread throughout Japan, Perkeomeris japonica are detritivores. They can be found on forest floors or other dark, damp places where they can consume decaying vegetation.

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.

Osmunda japonica

Osmunda japonica

No.03 Japanese Royal Fern

Osmunda japonica is a species of fern known in Japan as “Zenmai.” Zenmai produces both fertile and non fertile fronds, which can grow up to 50 cm and one meter tall, respectively. Like others in the Osmunda genus, the fertile fronds of the Japanese Royal Fern contain spores that darken and give the appearance of “flowering.” The fern is native to Japan, China, Korea, Taiwan, and eastern Russia. The immature fronds of the fern sprout in a tall spiral and can be collected and eaten as a vegetable.

Halichondria japonica

Halichondria japonica

No.33 Type of Sponge

Halichondria japonica is a species of marine sponge that is among the most common found in Japan. Like others in the class Demospongiae, it has an internal skeleton made of small, needle-like mineral structures called spicules that support its softer reddish-orange tissue. It can be found encrusted across rock surfaces in the intertidal zone, in tide pools, and in the cracks of rocks. Halichondria japonica is common along the coast of the central Japanese island of Honshu. In immune system evolution studies, this species has been shown to possess self and non-self recognition capabilities.