The term “turf exfoliation” has been coined by Sapper for a special type of denudation in Iceland, which is characterized by the destruction of a closed turf carpet by eolian deflation of the fine-grained subsoil and undermining of the turf. But, Troll considered, the deflation is only a secondary process, the essential primary process is freezing and frost-heaving of the bare soil by frequent, short-periodic change of frost and thaw. The same phenomenon is found in Cape Erimozaki region, Hokkaidô, which is situated in Dfb climate with strong wind and scanty snow-fall.