Regarding entry to Japan
Procedures for re-entry
Please refer here for re-entry procedure.
Japanese Border Measures
※If you were boarding an aircraft arriving in Japan after midnight (Japan time) on April 29, 2023, valid vaccination certificate or pre-departure test is not required.See here for details.
Visit Japan Web is a web service that visitors (including Japanese and foreigners who have reentry permits) can use for immigration and customs procedures in order to enter Japan.
Using this service, customs declarations and registration of foreign immigration records can be done in advance.