Samgak is a triangle-shaped variety of gimbap—South Korean rice roll. It consists of various fillings that are neatly placed inside a piece of triangle-shaped rice. The pouches are then wrapped in seaweed (gim) and are typically additionally covered with a thin plastic wrapper, which allows the gimbap to stay fresh for an extended period.
This gimbap was inspired by the Japanese onigiri, a similar triangle-shaped sushi variety, but the fillings were adapted to Korean taste, and traditionally include various combinations of kimchi, tuna, bulgogi, or gochujang paste.