The Byobugaura Cliff has been eroded by the action of sea waves. It one retreated at a rate of 50 to 100 cm per year because of this wave action. To protect it, wave-dissipating blocks were placed at the base of the cliff in the 1960s. Since the, the rate at which the cliff now retreats has slowed down tenfold.

Several white, concave-shaped strains can be found in the Byobugaura Cliff. These are volcanic ash layers. The time period when the Byobugaura strata were formed has been daled from these volcanic ash layers. The cracked strata at the top of the cliff from the Kanto Loam. Volcanic ash from sites such as Mount Hakone and Mount Fuji and eolian dust accumulated on land, thereby forming the Kanto Loam.

According to the classification of the history of Earth, the current geological time period is called the quaternary period. You can observe 2.6 million years old sediments on the boundary between the Neogene and the Quaternary periods in the cliff. However, there is no distinct visual difference.