The 31st
International Biology Olympiad 2020
Nagasaki, Japan

Date: July 3rd, 2020 (Fri) to July 11th, 2020 (Sat)
Venue: Nagasaki International University, Sasebo City, Nagasaki


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. 


Event Overview

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
Kitanomaru-Koen 2-1, Science Museum, Chiyoda City, Tokyo 102-0091 JAPAN
Phone: 03-3212-8518
Fax: 03-3212-7790

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!

Nihonhimea japonica

Nihonhimea japonica

No.25 Himegumo (Type of Cobweb Spider)

Nihonhimea japonica is a species of spider belonging to the family Theridiidae, the cobweb spiders. This family is very commonly encountered by humans and are among the most frequently found in homes.The himegumo is orange to light brown in color and is found in Korea, Taiwan, China, and throughout Japan. Like many others in the family Theridiidae, Nihonhimea japonica builds a complex cobweb above a dense flat “sheet” web. Insects are “knocked down” by the cobweb and land in the sticky sheet web, where the spider can capture it.

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.

Scolopendra subspinipes japonica

Scolopendra subspinipes japonica

No.35 Type of Centipide

Scolopendra subspinipes japonica is a species of venomous predatorial centipede found across Southeast Asia and East Asia. A large species, it grows to lengths of 75-130 mm. It has 21 dark green body segments, a reddish-green head, and one pair of dark yellow legs per body segment. In Japan, it can be found in forests, grasslands, and residential areas on the islands of Honshu, Shikoku, and Kyushu. While it stays hidden during the day under rocks, leaves, or in homes, at night it hunts spiders, cockroaches, and crickets. Its venom is poisonous to humans and can cause pain and swelling.

Halichondria japonica

Halichondria japonica

No.33 Type of Sponge

Halichondria japonica is a species of marine sponge that is among the most common found in Japan. Like others in the class Demospongiae, it has an internal skeleton made of small, needle-like mineral structures called spicules that support its softer reddish-orange tissue. It can be found encrusted across rock surfaces in the intertidal zone, in tide pools, and in the cracks of rocks. Halichondria japonica is common along the coast of the central Japanese island of Honshu. In immune system evolution studies, this species has been shown to possess self and non-self recognition capabilities.