Beach changes of the Akiya coast located in the western part of Miura Peninsula was investigated through field observations, analysis of aerial photographs and numerical simulation using the contour line change model. One of the causes of beach erosion is due to the longshore sand movement associated with the formation ofwave shadow zone of the breakwater of Kuruwa fishing port. The other main cause is the loss of sand due to the northward longshore sand transport, overflowing the foot of Chojagasaki Point located at the north end of the coastlineduring rough wave conditions.
