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Japan has been inhabited by people since about 35,000 years ago. Roughly 16,500 years ago a group of Neolithic hunter-gatherers, referred to as the "Jomon" culture, developed a complex society including the production of pottery and jewellery.About 3,000 years ago, rice cultivation in paddy fields was introduced to Japan. This saw the beginning of the Yayoi period which ended around the year 300 CE. After the Yayoi came the Kofun period (300–538 CE)...The authors note that the current consensus based on DNA evidence from modern Japanese people is that there was 2 or 3-way mixing between the indigenous Jomon people...

The current theory on human migrations into Japan is that the original inhabitants, the Jomon people, were met about 2,500 years ago by a separate group coming mainly from the Korean Peninsula, the Yayoi people. Archaeologists have identified fewer Jomon sites from the Late Jomon Period, the era immediately before the Yayoi arrival. Global temperatures and sea levels dropped during that period, which could have made life more difficult for the hunter-gatherer Jomon people. When the Yayoi people arrived, they brought wet rice farming to Japan, which would have led to a more stable food supply for the remaining Jomon...