After the research, people found many ruins of pit dwellings, graves of adults and kids, dirt hills, a large watch tower, storage and many earthenwares, stonewares, and tools. The educational knowledge and information of Jomon period in Japan are based on the study of the relics of Sannai Maruyama Historical Site.
At the out side field, there are many restored pit dwellings and actual ruins. There is also the museum that displays many relics found at this site.
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