The Korean Dynasty maintained the government policy that the agriculture should be the base of the country's economy, and they basically had no need to trade with foreign countries except for some materials which were not produced within the country.
朝鮮王朝は農本主義を国是としており、本来なら国内で産出することの無い必要最小限の物資の入手を除けば外国との交易を必要としていなかった。