 Jōmon culture which had existed in ancient Japan for over 6,000 years suddenly disappeared around 300 BC.The farming techniques and knowledge that Xu brought along are said to have improved the quality of life of the ancient Japanese people and Xu Fu is said to have introduced many new plants and techniques to ancient Japan, albeit all the existing texts are mainly in Kanji text that now cannot be read by the present day Japanese.The worship of Xu Fu as the "God of farming", "God of medicine" and "God of silk" by the Japanese is attributed to these achievements.