Bento is a single-portion takeout or home-packed meal common in Japanese cuisine. A traditional bento holds rice, fish or meat, with pickled or cooked vegetables, usually in a box-shaped container. Containers range from disposable mass produced to hand crafted lacquerware. Bentos are readily available in many places throughout Japan, including convenience stores, bento shops, railway stations, and department stores.

https://en.wikipedia.org/wiki/Bento