What is the origin of the Japanese people?

We don't know much about where the Japanese originally came from. But it is believed that the origins of the Japanese are related to a primitive mongoloid race because most Japanese babies are born with blue spots called Mongolian marks at their bottoms. It is also believed that people called Jomons are said to have entered Japan from the Eurasian Continent over the "ice bridge" and gradually mixed people from the Eurasian Continent and Southeast Asia who moved to Japan.