Presently, there are 13,000 and over 0.4 million sites in Gunma prefecture and Japan, respectively. The site is an "Encyclopedia of Subsistence" left by our predecessors. Learning the predecessors' wisdom will lead to constitute magnificent future. Our web site is open to everyone and aimed to learn primitive and ancient time as "Learning Forum". Here, we offer you the information of excavation research in Gunma prefecture.Following the history of Gunma prefecture and Japan, you will be able to enjoy time travel.