Mt. Buko is the peak that rises to the south of the city. It is the symbol of Chichibu, a mountain the people of Chichibu feel close to, and a mountain with religious significance. The mountain is also important in terms of natural science, particularly its geology, animals and plants.
The main exhibitions include panels featuring the background to the development of the Chichibu mountains; a 3D topographical model of the region around Mt. Buko, specimens of the animals found in the Mt. Buko area, and a photographic display of limestone soil plants including the Chichibu primula and the Miyama lily.