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 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.

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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.

Lychaete japonica

Lychaete japonica

No.37 Type of Green Algae

Lychaete japonica is a species of marine green algae of the order Cladophorales. Whitish-green when alive, it grows in strong, upright, branched fronds that look dense and tufted. Most plants of this species grow up to 20 cm tall and are dark green when dead and dried. Found in the ocean south of the Tsugaru Strait in Japan, it grows on rocks near the low tide zone or in shallow water depths. Other Cladophorales species from the mid-Ordovician have possibly been found in the Winneshiek Shale in Iowa, USA.

Eutrema japonicum

Eutrema japonicum

No.10 Wasabi

Eutrema japonicum is a perennial herb whose rhizomes are commonly ground into a paste and eaten as a condiment with sushi and noodle dishes in Japan. It grows up to 50 cm in height with round, kidney shaped leaves and white flowers. The plant is native throughout Japan and Russia’s Sakhalin Island where it grows on the banks of cold mountain streams. Wasabi has antimicrobial properties and can help preserve food and ward off oral bacteria. Nasal irritants found in wasabi that are capable of waking people from sleep have been used to develop smoke alarms for the hearing impaired.

Ulnaria japonica

Ulnaria japonica

No.20 Type of Diatom

Ulnaria japonica is a species of phytoplankton belonging to the class Bacillariophyceae, the diatoms. Diatoms are incredibly important photosynthesizers, accounting for about 20% of global primary productivity. They are eukaryotic, unicellular, and possesses a unique cell wall called a frustule that is made of intricate patterns of silica. After the diatom’s death, the frustule sinks and becomes buried in the sediment below and can eventually form diatomaceous earth. The frustule of Ulnaria japonica is needle-shaped and is 30-100 μm long by 2-3μm wide. It can be found in Japanese lakes and reservoirs.