I don't travel light. My backpack is usually about 17kg but when boarding my last flight the check-in scale thought it was 19kg. Sadly my next flight, the day after tomorrow, has a 15kg luggage limit.
I can transfer some small heavy items to my carry-on and I do have some things I can throw away but my current accommodation doesn't have a way to weigh my stuff. I don't want to get rid of more than necessary.
If I arrive a good few hours early can I weight my stuff at Naha airport while I re-pack? I've done this at a couple of airports in the past but can't remember seeing scales available in every airport I've been to.