In this paper, several vocabulary words used through exchanges are described in Korea and Japan. The foundation culture was understood in terms of language exchange and propagation. The vocabulary pattern mentioned here corresponds mainly to the adjoining propagation principle of linguistic geography. It cites as an example a vocabulary that has spread between Busan and Kyushu, among others, the closest Korea and Japan through geographical proximity effects. It was introduced by moving around the ocean. It was probably the shortest section that was spread and settled frequently. Many examples have not been given in this paper. However, the purpose of the project was to help them understand the language-based culture of Northeast Asia by expanding the region and increasing their vocabulary.