noun
man-made beach; artificial beach
Refers to a beach created by human engineering, often using imported sand and coastal structures, as opposed to a natural beach.
この人工海岸は夏になると多くの海水浴客でにぎわう。
This artificial beach gets crowded with many beachgoers in the summer.
自然海岸 is a natural coastline, in contrast to 人工海岸 which is man-made.
Compound of 人工 (じんこう, 'artificial') and 海岸 (かいがん, 'beach, coast').