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!

Fibrocapsa japonica

Fibrocapsa japonica

No.13 Type of Eukaryotic Algae

Fibrocapsa japonica is a type of eukaryotic algae called a raphidophyte. It is unicellular, golden-brown, has no cell wall, and possesses flagella. First reported in Japan, Fibrocapsa japonica blooms are potentially toxic to marine life and have been associated with large fish mortality events in Japan. It blooms worldwide in coastal temperate and tropical waters with high nutrient conditions. While the mechanism for its toxicity is not well understood, it is known to produce neurotoxins, mucocysts that can clog fish gills, haemolytic compounds that destroy red blood cells, and reactive oxygen species that injure gill tissue and cause asphyxia.

Mimobdella japonica

Mimobdella japonica

No.28 Manebiru (Type of Leech)

Mimobdella japonica is a species of predaceous leech belonging to the order Arhynchobdellida, the probiscisless leeches. Growing to approximately 70 mm long and 7 mm wide, its body is muscular, is marked by external rings called annuli, and has a yellow-orange dorsal coloration. It has been found in the Ryukyu Islands of southwest Japan in rice paddies, marshes, and swamps. Mimobdella japonica lacks a jaw and teeth and is a semi-aquatic predator, hunting small invertebrates like earthworms and swallowing them whole.

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.

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.