First of all, the travels between the foreign countries have been severely restricted by the covid-19 infection. If you consider to visit Japan and attend the conference onsite, please investigate the newest condition and rules for the entry to Japan from your resident country by yourself.
For those who need an invitation letter and related documents:
If you need the documents for application of your visa for entry to Japan, please purchase a relevant ticket (6,000 JP Yen per person) to write us a request in the registration site.
For details on the application of visa for entry to Japan, we will make contact with each of you. Please follow the instruction.
You can get information on the entry visa for Japan at Ministry of Foreign Affair of Japan: https://www.mofa.go.jp/j_info/visit/visa/index.html