Lakes of Akita Prefecture

crater lake

crater lake

thumb|Plans for the creation of the lagoon designed by Pieter Philippus Jansen is a lake in Akita Prefecture in northern Japan. Its formal name is , but it is also called . At 4 meters below sea level, Hachirōgata is the lowest natural point in Japan.

Megata is a volcanic group on the Oga Peninsula in northwestern Honshu, Japan. It consists of three basaltic-to-dacitic maars at the edge of the peninsula. These maars measuring between and across are filled with water, forming freshwater lakes. Ichinomegata is the widest and oldest of the three. These features date to around the Pleistocene although pottery discovered between layers of tephra has been dated to 4,000 years before present. An older and larger maar is located offshore on the western coast of the peninsula, known as Toga (Togowan), it formed 450,000 years ago. The western wall of