Activities Lake Okushima（Okushimako） is a Must-Visit Site in Shim Onsen!
Lake Okusima (奥四万湖） Lake Okushima is a famous place in the Shima Onsen resort where you can see the magical blue water i...
oku shima lake
Activities 
Movies Exploring the Shima Onsen on a Bike Vol.3 Oku Shima Lake
From Hinatami Yaushi to Okushima Lake (Shima Gawa Dam)! Okushima Lakes is a dam lake in place of approximately 2.5km fro...
Highlight Amazing Blue /Shima Blue
As you can know because it is inside Joshinetsu Kogen National Park, Shima Onsen is the treasure box with rich nature. I...
Highlight The Water Color, Called “Shima Blue” is the Treasure of Shima Onsen
Among the nature at Shima Onsen, we are proud of the color of the water of Shima Gawa River the most. We call it “Shima ...