The coast along Suruga Bay was seriously damaged in places by the typhoon No.6626 on September 24 and 25, 1966. In the middle of December, a field survey along the coast of Suruga Bay was conducted in order to make clear not only the disaster and its cause by this typhoon but the also the alos relation between the property of this coast and the typhoons attacking in these several years.
　The coast of Suruga Bay is classified into four parts; the east coast, the coast of Uchiura Bay, the recess coast and the west. coast. The east coast is mountainous, containing many small inlets, The coast of Uchiura Bay is sheltered from the ocean waves invading from the mouth of Suruga Bay. It has mountainous small inlets in the south side and sandy beach in the east side. The recess coast is directly facing the mouth of Suruga Bay. Its front beach is composed of gravel and has steep slope under the influence of the Fuji river. The west coast is formed of fans by the Aberiver, the Oi river and others. Its norhern part is composed of gravel and its southern part is of sand.
　The disaster by over-topping of typhoon waves in these several years occurred in rather accreted beaches where depth contour-lines get near to the shoreline compared with its vicinity. In each fan, sea walls near the mouth of each river were collapsed by the erosion at their foot by waves in the rihgt side coast rather than in the left side coast of the river mouth, though the material discharged from each river in this bay moves towards the right side more than the lift side.
　The recess coast and the northern part of west coast most suffered from typhoon wavesas usual, because the canyon runs from the mouth of the bay toward the recess.