THE IMPLEMENTATION OF MANY CIVIL ENGINEERING PROJECTS DURING THE FAST FINANCIAL DEVELOPMENT PERIOD OF INDUSTRIAL COUNTRIES LIKE JAPAN HAS CAUSED THE DESTRUCTION OF A CONSIDERABLE PART OF THEIR COASTS. FOR INSTANCE, ONLY IN A FIFTEEN-YEAR PERIOD BETWEEN 1978 AND 1992, A 2, 395-HECTARE AREA OF JAPANESE SANDY COASTS HAS BEEN DESTRUCTION. IF WE ADD THE GRAVELLY COASTS TO THIS NUMBER DURING THE SAME PERIOD, AN STRIP OF 2.5 METERS HAS BEEN REDUCED FROM THESE COASTS. IN OTHER WORDS, THE SANDY AND GRAVELLY COASTS OF JAPAN RECEDE BY AN AVERAGE OF ONE METER EVERY SIX YEARS.NOW, THE FINANCIAL GROWTH PERIOD HAS PASSED AND THERE IS A RELATIVE RELIEF IN THESE COUNTRIES, AND THE IMPORTANCE AND NECESSITY OF THE SANDY COASTS IS NOW CLEAR, UNFORTUNATELY AFTER THE DESTRUCTION, WITH THE ISSUE OF RESTORING AND STABILIZING THEM IS NOW THE GROWING CONCERN. IN GENERAL, THE SEDIMENT MOVEMENT IN THE NEAR-COASTAL WATERS OCCURS UNDER THE IMPACT OF WAVES AND THE CURRENTS OF THE AREA. IN THIS ARTICLE, AFTER REVIEWING THE ABOVE FACTORS, A BRIEF DISCUSSION FOLLOWS ABOUT HOW THE SEDIMENT (MAINLY PEBBLES) MOVES IN THAT AREA AND WHAT IMPACTS IT HAS ON THE SHAPE OF SEABED AND COASTLINE. AFTERWARDS, THE CAUSES OF EROSION, SANDY COASTS RECESSION AND ITS CONSEQUENCES ARE DISCUSSED, AND SANDY COAST EROSION PREVENTION TECHNIQUES, THEIR ADVANTAGES AND DISADVANTAGES ARE POINTED OUT AT THE END.