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Excavation of this site turned up an astonishing number of intact artefacts from Japan's Jōmon era (10,000 to 2000 years ago), which are on display at the museum here. Clay figures, jade beads and large chestnut pillars head the collection, and there are also some reconstructed dwellings. Sannai Maruyama is approximately 5km west of JR Aomori Station. City buses leaving from stop 6 for Menkyō Center stop at Sannai Maruyama Iseki-mae (¥300, 20 minutes).