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!

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.

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.

Dugesia japonica

Dugesia japonica

No.29 Type of Planarian

Dugesia japonica is a notable non-parasitic flatworm found across East Asia. Growing between 10-35 mm long and 1.5-7 mm wide, it has an elongated brown body, a triangular head, and two eyes. It is the most common freshwater planarian found in Japan, and resides in both running and standing water. Like others in its genus, Dugesia japonica is famous for being able to completely regenerate itself from a small, amputated part of its body. It also has a well-organized brain with decision-making capabilities. Because of this, Dugesia japonica is used as a model organism within neurobiology and regenerative medicine.

Mauremys japonica

Mauremys japonica

No.06 Japanese Pond Turtle

Mauremys japonica is a species of freshwater turtle native to Japan. Females of this species can grow shells up to 21 cm long, while males grow smaller shells up to 14 cm long. Found across Japan except for the northern island of Hokkaido, Japanese pond turtles live in rivers, marshes, ponds, and irrigated rice fields. Its diet can include small amphibians, insects, algae, and earthworms. Although not currently considered threatened, habitat destruction via land development, exploitation from the pet trade, and the introduction of invasive turtle species have caused concern for native populations of Mauremys japonica.