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.

If you reload the browser, new species will appear!

Glirulus japonicus

Glirulus japonicus

No.27 Japanese Dormouse

Glirulus japonicus is a type of arboreal, nocturnal rodent called a dormouse. Similar to both mice and squirrels, it has thick brown hair, a fluffy tail, and a black stripe on its back. It grows to lengths of 105-135 mm and have sharp claws on its feet that enable it to run upside-down on tree branches. Glirulus japonicus resides in deciduous and coniferous forests across Japan, except on the island of Hokkaido. Once considered to be Shinto guardian deities of the mountain, they are now listed as “nearly endangered” by the Ministry of Environment in Japan due to deforestation.

Branchiostoma japonicum

Branchiostoma japonicum

No.05 Japanese lancelet

Branchiostoma japonicum is a species of lancelet (or “amphioxus”) that belongs to a subphylum of Chordata called Cephalochordata. Members of this subphylum are translucent, resemble fish, and retain their notochord into adulthood, but have no true vertebrae or skeleton. Because of their morphology and their phylogenetic closeness to chordates, lancelets are important in studies of vertebrate evolution. Japanese lancelets grow up to 5 cm long and live in subtidal zones where they anchor themselves in sand and filter-feed using their cilia. This lancelet is primarily found in Japanese waters but has also been found in waters near Xiamen, China.

Clypeaster japonicus

Clypeaster japonicus

No.18 Japanese Sea Biscuit

Clypeaster japonicus is a species of sea urchin called a sea biscuit. Sea biscuits are irregular echinoids, meaning they have a definite front and back and move in a specific direction. Its brown calcium carbonate shell, or test, is in the shape of a pentagon, features a five-petaled “flower” on its surface, and is up to 12 cm across. The spines of Clypeaster japonicus are short and resemble small hairs. Found in Japanese waters around the islands of Honshu and Kyushu, Japanese sea biscuits live buried in sediment and emerge at night to feed on sediment food particles.

Anguilla japonica

Anguilla japonica

No.08 Japanese eel

Anguilla japonica is a commercially important species of eel in East Asia. This species grows to about one meter long and can be found in China, Japan, the Philippines, Korea, and Taiwan. Japanese eels spend their lives in both saltwater and freshwater, spawning in the sea west of the Mariana Islands and migrating to freshwater estuaries, rivers, and lakes to develop. During this migration, eel fry are collected to be raised in commercial fisheries. Anguilla japonica is currently listed as an endangered species as the result of overfishing and changing ocean salinity conditions at its spawning site.