THEME: "Transcending Barriers, Creating Opportunities"
If you are visiting Japan for the conference trip and are a citizen of a non-country, you may need a visa. A visa is a permit to travel to and stay in a country for a limited period.
Currently, the Japanese Ministry of Foreign Affairs grants visa waivers/exemptions, that have special agreements with Japan.
(A stay of up to 90 days for conference, tourism, business, visiting friends or relatives, etc. that does not include remunerative activities)
For more info: https://www.mofa.go.jp/j_info/visit/visa/index.html