Mt. Buko, the symbol of the Chichibu region of Saitama Prefecture, contains a large deposit of limestone, one of the few mineral resources in which Japan is self-sufficient. In the mid-1970s, demand for the material increased sharply in tandem with Japan’s high-economic growth, and as large-scale excavation continued, the mountain’s summit was drastically altered to the point that its elevation decreased. Initially, the chopped-up hillside of Mt. Buko, visible from many places in Chichibu, seems like a pitiful example of natural destruction. But when we remember its close links to the metropolis of Tokyo, it takes on a different appearance.