Lake Ichinomegata

What it is

• A freshwater lake formed as a water-filled explosion crater known as a maar.
• Designated as a National Natural Monument and part of the Megata Volcano Group.
• The first site where mantle-derived xenoliths were discovered within andesite rock.
• A circular body of water with a diameter of approximately 600 meters.

What to see

• Panoramic views of the crater lake from the Hachibodai observation point.
• Xenoliths from the site displayed at the Akita University Mining Museum.
• A deep volcanic basin reaching a maximum depth of 44.6 meters.

Getting there

• Accessible via the Showa-Oga-Peninsula Interchange on the Akita Expressway.

Notes written by Japan Gems from facts in Japanese Wikipedia.