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!

Perophora japonica

Perophora japonica

No.36 Type of Colonial Sea Squirt

Perophora japonica is a species of marine invertebrate called a tunicate or “sea squirt.” Colonial in nature, this species consists of round, 4-6 mm long, yellowish-green zooids growing together along a branch-like structure called a stolon, which grows from a barrel-like body called a tunic. At the stolon’s end are yellow star-shaped zooids that can form their own colonies when dislodged. While native to Japan, Korea, and Russia, it has spread to the coasts of the UK, France, the Netherlands, Spain, West Africa, and the west coast of North America, possibly in the hulls of commercial and recreational ships.

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.

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.

Hydroglyphus japonicus

Hydroglyphus japonicus

No.22 Type of Diving Beetle

Hydroglyphus japonicus is a small species of beetle belonging to the family Dytiscidae, the predatory diving beetles. Its ovate body is about 2 mm long and dark brown with a few golden highlights along its back. Like other semi-aquatic beetles, adult Hydroglyphus japonicus breathe via an exterior air bubble that is connected to a cavity beneath its wing cases that must be periodically replenished. Hydroglyphus japonicus prefers shallow, watery environments with plenty of vegetation and very few insectivorous fish. In Japan, it can be found in rice fields and other wetlands where it preys on insect larvae.