It is likely to mean kongjaban, and kongjaban refers to a side dish made by boiling soybeans in soy sauce. You can find 1kg kongjaban products on online markets, and the characteristic of this is that using corn syrup instead of sugar during the process of soaking and boiling the soybeans prevents the soybeans from becoming hard.  This 1kg large capacity product is enough to feed the whole family with one purchase.It is popular as a side dish with rice because of its moderately sweet and salty taste.