The shallow nature of the seabed on the north of the bay, and the funnelling effect of tsunami and typhoon wave energy, contributed to certain parts of the Shonan coast having suffered considerable damage, including the destruction of the Kōtoku-in temple housing the Great Buddha, or Daibutsu during the massive tsunami of 1498.
Det lavvandede område i den nordlige del af bugten og tunneleffekten af bølgeenergien fra tsunamier og tyfoner har bidraget til at visse dele af Shonan kysten har lidt betydelige skader, herunder ødelæggelsen af Kotokuin tempelet (高徳院　こうとくいん) der huser den Store Buddha, eller Daibutsu (大仏　だいぶつ) under den store tsunami i 1498.