Kōzuke Island

Kōzuke Island is a small landmass in Lake Chūzenji positioned at about 1,269 meters (4,160 feet) elevation with views across the surrounding mountains and water. The island remains unpopulated and can be observed from boats that navigate the lake.

The island was formed through the same volcanic activity that created Lake Chūzenji itself and has remained in its natural state since ancient times. Its existence is closely linked to the geological history of the Nikko region.

The island appears in local stories and legends that people in the area tell about Lake Chūzenji and its role in their connection to the natural world.

The island can be viewed from boats that regularly navigate Lake Chūzenji throughout the year, providing access to see it up close. Visitors should know that the island itself is not accessible for landing, so viewing occurs from the water.

Despite its tiny size, just a fraction of a hectare, the island is a notable feature within Lake Chūzenji's landscape that often surprises visitors with its minimal presence. Its scale makes it a remarkable example of the region's diverse geography.

Location: Nikko

Elevation above the sea: 1,269 m

GPS coordinates: 36.73000,139.46722

Latest update: December 10, 2025 16:26