Recent research has identified an extended exchange network in the Japan Sea Rim area extending over 3,000 km and including the mainland. This paper reviews current knowledge about obsidian studies in Hokkaido, a part of this region, and makes proposals for future research. The geology of Hokkaido and its 21 known obsidian sources are reviewed and results of chemical analyses of some sources described. Archaeological studies of exchange networks, exploitation patterns and site variation are described. Proposals for the direction of future studies include additional research on the location, geological history and characterization of obsidian sources and the use of new models concerning procurement range, mobility patterns and behavioural strategies.
