The First Emperor did not want to die. He went to Shandong and Jiangsu to look for people who would be able to make him live forever. No one was able to do that, but some people think that Xu Fu's journeys to look for Mount Penglai were important for Japan. This was about the time Japan's early Jōmon stage ended and its Yayoi stage started. The Yayoi time was the start of farming and the start of large countries in Japan. The First Emperor died in 210  BC.