My Japan resident card is good until 2021, but my passport will expire in less than 6 months. I need to go on a business trip outside of Japan very soon and may not have enough time to renew my passport.
The trip itself only lasts about 1 week so my passport will still be valid when I come back, but with less than 6 months of validity, will I be able to enter Japan?
Update: the consensus is while I won't have trouble entering Japan with my soon to expired passport, it is possible that airline will deny me boarding. Because of that, I decided to play it safe and paid some extra money to have my passport renewed quickly.