Did you gain or lose weight in Japan?

Asking out of curiosity.
I am starting to feel my pants tighten lol.
With 164cm/49kg even 2kg become noticeable so I am thinking I gained around this amount.
No regrets though (or at least I try to have non)! I intentionally never miss the opportunity to try out food here.
I also rented a car for the first leg so only around 10k-15k steps daily.