The original idea for developing this book as Proceedings from the Symposium on Obsidian Source Studies in Northeast Asia, held at the 70th Annual Meeting of the Society for American Archaeology (2005), was conceived in the summer of 2004. 1) Introduction: Obsidian Sourcing in the North Pacific Rim Region and Beyond It (Yaroslav V. Kuzmin and Michael D. Glascock); 2) A Review of Archaeological Obsidian Studies on Hokkaido Island (Japan) (Masami Izuho and Wataru Hirose); 3) Prehistoric Procurement of Obsidian from Sources on Honshu Island