Koga Falls

Koga Falls is a two-part waterfall system set within the volcanic landscape of the Aso region. Odaki plunges roughly 80 meters down, while Medaki stretches about 100 meters through the rocky terrain, with water flowing through the porous volcanic rock formations.

The waterfall system formed through geological processes in one of Japan's most active volcanic regions, where volcanic activity shaped the landscape over thousands of years. The valley and slope formations were created by repeated eruptions and erosion.

The falls hold meaning for local communities as a place where nature transforms seasonally, and residents value the winter ice formations as a natural wonder worth witnessing. Visitors experience how the landscape shapes the rhythm of activities and attention throughout the year.

Access to the falls is through a designated parking area, with a path leading from there to the cascades. The experience is most striking during the colder months when ice formations develop on the rocks and enhance the natural display.

During winter, powerful winds from the Aso Valley create natural ice formations on the rocks that produce distinctive crystalline patterns. These frozen structures are fleeting and change daily, making each visit reveal different details.