ABSTRACT
Coastal valleys, which had been deeply eroded during the Pleistocene, were subject to post-glacial transgression by the rising sea, resulting in zigzag coast lines of rias in many areas of Japan. Marine fishing, one feature of Jomon subsistence, flourished in this environment. The Mazukari shell midden, which was deeply submerged by the then rising sea and buried under the alluvium, provides an important record of the changing marine environment.
