Abstract
Gravitational mass rock creep structures are commonly found in the Sambagawa crystalline schist region in the Kanto Mountains. The structures are classified into the following four types: overturned fold, chevron folds, fracture zones, and topples. The mass rock creep, except for the toppling, is the main mechanism for the landslide topographies characterized by the moving directions of masses that make acute angles with the dip direction of the bedrocks. These landslide topographies are more abundant in comparison with the other types of landslide topographies which make the obtuse angles with the dip direction.
