Lake Kojima

児島湖

An expansive artificial lake in Okayama known as the world's second largest man-made lake created by a massive dike.

What it is

An artificial lake in southern Okayama Prefecture covering 10.9 square kilometers.
Created in 1959 to provide irrigation water and prevent salt damage to farmland.
The world's second largest artificial lake excluding those formed by dams.
A freshwater basin separated from the sea by a 1,558-meter long dike.

The 1,558-meter dike that separates the lake water from Kojima Bay.
Konan Airport situated directly on the shore of the lake.
The confluence where the Sasagase, Kurashiki, and Kamo rivers flow into the basin.
The dike road which is open for public travel across the water.

Notes written by Japan Gems from facts in Japanese Wikipedia.