Due to the COVID-19 pandemic, IOI 2020 will be held online. More info is available on the official website.

Update   IOI 2020 will be held online

Invitations to IOI 2018

Dear colleagues,
JTB Communication Design Inc. (JCD) will be sending out Invitation letters for IOI 2018 JAPAN, which will be held in Tsukuba, Ibaraki, Japan from September 1st to September 8th, to the leaders of IOI 2017 and the emails listed on the IOI member list.

The registration system for IOI 2018 JAPAN will be open from May 15th to June 15th.

If there needs to be a change/update to the recipient's email address and/or to the invitation letter, for example, recipient's name, please contact For all other matters, please contact


Seiichi Tani 
Executive Director of the Japanese Committee for the IOI 
IC (International Committee for the IOI) member from Japan, IOI 2018 Host

Need more info?


Not sure where to go? Click here to view some basic information on how to learn programming and prepare to win a medal at the IOI.


A couple of volunteers maintain a separate page with stats about people who participated at the International Olympiad in Informatics.


The IOI publishes a journal every year, with original high-quality scientific papers related to education, contests and algorithms.