Without a Japanese '''re-entry permit''' (再入国許可 ''sai'nyūkoku kyoka''), if you leave Japan your current working visa will end and you will need to apply for a new visa to return to Japan (potentially a few months to process). Re-entry permits allow you to leave the country and return once (a one-time re-entry permit) or to leave and return an unlimited number of times (a multiple re-entry permit). Once you hold a re-entry permit, you are allowed to stand in the Japanese passport holders line in customs, which is much faster than the foreign passports line.

Without a Japanese '''re-entry permit''' (再入国許可 ''sai'nyūkoku kyoka''), if you leave Japan your current working visa will end and you will need to apply for a new visa to return to Japan (potentially a few months to process). Re-entry permits allow you to leave the country and return once (a one-time re-entry permit) or to leave and return an unlimited number of times (a multiple re-entry permit). Once you hold a re-entry permit, you are allowed to stand in the Japanese passport holders line in customs, which is much faster than the foreign passports line.