Bento, says Wikipedia, is a single-portion takeout or home-packed meal common in Japanese cuisine.
A traditional bento consists of rice, fish or meat, and one or more pickled or cooked vegetables, usually in a box-shaped container.
Containers range from disposable mass produced to hand crafted lacquerware. Although bento are readily available in many places throughout Japan, including convenience stores, bento shops (弁当屋, bentō-ya?), train stations, and department stores, it is still common for Japanese homemakers to spend time and energy for their spouse, child, or themselves producing a carefully prepared lunch box.
Bento can be very elaborately arranged in a style called kyaraben. Contests are often held where bento arrangers compete for the most aesthetically pleasing arrangements. Kyaraben is typically decorated to look like people, animals, or characters and items such as flowers and plants.
There are similar forms of boxed lunches in the Philippines (Baon), Korea (Dosirak), Taiwan (Biandang), and India (Tiffin).