In Kotobikihama, to protect the precious nakisuna, a clean up activity founded by residents and volunteers is actively being carried out. Smoking is prohibited on the seashore and offenders are punished. However, even if people carry out clean up and edification activities, we should not forget that the sea contains the "inochi no mizu" (life water) that actually cleans the seashore. Indeed, to protect the surrounding waters is an important task set for us.