Video from CaspianReport
"We tend to think that Christianity entered foreign lands only due to missionary work. Not so in Korea. Until the late 19th century, the mountainous Korean Peninsula was governed tightly by a Confucian tradition and closed off to most foreigners. Missionaries found it difficult to penetrate the reclusive nation, focusing instead on Korea’s larger neighbors, China and Japan. Consequently, Koreans themselves played a more significant role in importing and later spreading Christianity to Korea. Three hundred years later, Christians make up more than a quarter of South Koreans and the country is responsible for one of the world’s largest missionary movements. What first caused Christianity to take hold in Korea?..." from the article: Who Brought the Gospel to Korea? Koreans Did.