About entering Japan

As of June 10, if the person in charge of receiving a foreigner, such as a travel agent located in Japan, completes the prescribed application in the Entry-Reentry Health Verification System (ERFS), the new entry of a foreigner for a short stay for tourism purposes will be permitted in principle as if there were "special circumstances".

However, this is not the case for all countries.
Please check the website of the Ministry of Foreign Affairs, Japan.