This is a Lucky Pack containing a certain amount of Japanese Candy. In this sense, "Japanese candy" does not mean the package will only contain candy that's produced in Japan. It means the package will contain candy, that can be bought in Japan.
Since it is a Lucky Pack, the contents will not be revealed. It is however possible to give hints, allergies and dislikes. (Example: I like chocolate, I hate chips and I'm allergic to shrimp). While we cannot guarantee items that are precisely like your desription, we will try to comply.