The Sannai Maruyama site, located in Aomori City, Aomori Prefecture, Japan, is a significant archaeological site that provides a window into the Jomon period, dating back to approximately 3900 BCE. Recognized for its historical value, it was designated as a Special Historic Site in 2000 and later inscribed as a UNESCO World Heritage Site as part of the Jomon Prehistoric Sites in Northern Japan in 2021. This site offers a unique glimpse into the lives of the Jomon people through its well-preserved ruins and artifacts, including dwellings, pottery, and tools, which reflect the ingenuity and adaptability of the early inhabitants of Japan.