At the present time little is known in the Western world about the archaeology of Hokkaido, Japan. Groot (1951) is of limited value for most of his explorations were in the Tokyo area. This dearth of evidence is extremely regrettable in view of the so-called "Ainu problem" about which so many speculations have been published during the past century. During 1953-54 while stationed in Hokkaido with the United States Army, I explored and visited a number of prehistoric sites and made several collections which are now in the U. S. National Museum. Of the many sites visited, three in the southwestern part of Hokkaido in the Sapporo area were chosen for partial excavation. Radiocarbon dates for these sites were determined by the U. S. Geological Survey Radiocarbon Laboratory through the courtesy of Meyer Rubin.