Lake Nakaumi is the fifth largest lake in Japan. Connected to the Sea of Japan via the Sakai Channel and to Lake Shinji through Ohashi River, it is a brackish lake with abundant wildlife. Its two main islands, connected by bridges and roads, are Daikonshima and Eshima.
The little Eshima Island is connected to Tottori Prefecture with a rigid frame bridge culminating at 45m above sea level, providing a vista-point for a majestic view of Mt Daisen. Lake Shinji and Nakaumi together are designated as Ramsar Convention Wetlands of International Importance since 2006.