Snacks!
The best thing I've ever eaten in japan is the japanese snacks. There are all sorts of snacks here, but my favourites one are KitKats. KitKats are different in Japan than in Europe, for example in Europe or America only two flavors are available, white chocolate and milk chocolate, sometimes there are special editions but rarely. Here in Japan you can find ANY type of taste, from macha to strawberry ice cream flavor but also pudding or mochi flavor. It is truly exceptional, I hope to try them all sooner or later!