Visit Japan web: https://vjw-lp.digital.go.jp/en/
This is a useful website for travelers to perform arrival procedures.
Current Japanese Border Measures: https://www.mhlw.go.jp/stf/covid-19/bordercontrol.html
The latest updates on COVID-19 border measures can be checked on this website.
Regarding the Visa application, we are going to send invitation letters to those accepted to attend the conference, which can be used to apply for a Visa.