From 1 November 2020, foreign residents in Japan will not be required to apply for “Receipt for Request of Re-entry” from the immigration office before temporary leaving Japan.
A valid re-entry permit obtained upon embarkation from Japan and a certificate of negative COVID-19 test result presented during re-entry to Japan are still required. The certificate of negative test result needs to be conducted upon returning to Japan within 72 hours of the departure time of the flight.
More information on Japan’s Ministry of Foreign Affairs ja Ministry Of Justice homepage.