A few years ago, I won this non-sale onigiri box from Fujicco. Comes with instructions. New, unopened, stored at home. This is the "ONIGIRAZU BOX" product. It's a lunch box or cooking tool for making onigirazu (rice sandwiches). It's designed to be "easy even for children!" It has an "easy-cut rail" for easy cutting of the nori seaweed. New and unused. I have one more set of the same item. Please comment if you need it.