We will be leaving Narita end of September around 22.35. Last December the airport was dead at that time in the evening. Now it seems that the IASS lounge is open till 19.00 and the KAL lounge till 19.30, but ANA will close much ealier.
We will be flying business and have a priority pass.
Is there any information of lounges extending their opening times in the coming months or is it still too early for that?