[6] The dish is often part of a packed meal, or dosirak, to be eaten at picnics and outdoor events, and can serve as a light lunch along with danmuji (yellow pickled radish) and kimchi.The two words were used interchangeably until gimbap was made the universal term, as part of efforts to clear away remnants of Japanese colonialism and purify the Korean language.[10][16][17] Production of gim (김) in Gyeongsang and Jeolla provinces is reported in books from the fifteenth century, such as Gyeongsang-do Jiriji and Sinjeung Dongguk Yeoji Seungnam.[18][19] Yeoryang Sesigi (열양세시기), a Joseon book written in 1819 by Kim Mae-sun (김매순), refers to cooked rice and filling rolled with gim as bokssam (복쌈; transcribed using the hanja 縛占, pronounced bakjeom in Korean).[22] Popular ingredients include danmuji (yellow pickled radish), ham, beef, imitation crab meat, egg strips, kimchi, bulgogi, spinach, carrot, burdock root, cucumber, canned tuna, or kkaennip (perilla leaves).