New answers tagged souvenirs
I would put it in checked baggage, as the cargo area is usually colder than the passenger compartment.
The cheapest is likely for her to get an extra suitcase and carry it back with her. Even at the elevated prices, it'll still be cheaper than airmail.
You can mail a 50 pound (22.6 kg) package from the US to Japan for $180 via Priority Mail International. The maximum allowed length is 60", and the maximum length plus girth combined must be less than 108". If you buy the postage online it is $160, and you fill out and print the customs forms at the same time. The catch is you have to get a special customs ...
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