北海道福島町館崎遺跡と青森県三内丸山遺跡の地図 (IMAGE) Kumamoto University Caption 北海道に自生していない栗を運び込むためには海を渡る必要がある Credit Prof. Hiroki Obata Usage Restrictions This image may only be used in conjunction with the accompanying release, or stories written about the work described in the release with reference to the original work. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.