Travelling to Japan almost every month, there are not many sweets that my familly and friends have not tasted from the land of the rising sun. But I always wondered if it was possible to bring home some of those delicious desserts.
I know most airlines allow dry ice in quantities not exceeding 2.5 kilograms per person. But how much would I actually need to bring home one of their famous puddings? We are talking about a 18 hour flight (transfer included).

Has anyone here brought home frozen delights?
I would like to hear some advice.