Midoronuma (Goshikinuma Pond Group)

Midoronuma Pond (Deep Mud Pond) is part of the Goshikinuma Pond Group, a colorful cluster of around 30 shallow ponds and swamps formed when Mt. Bandai erupted in 1888 and triggered a landslide that blocked a nearby river. Midoronuma is one of the smallest bodies of water on the Goshikinuma Trail. The pond is fed by multiple underground springs, varying the colors within the pond and creating a dappled effect. Color gradients range from blue-green or yellow-green to electric blues depending on variations in water quality, plant life, and the quality of the light.