The landslide has occurred between ASAMUSHI ST. and NONAI ST. of TOHOKU main line. in the 27th, july, 1966.
The sliding earthmass burried the railroad over the length of 80 meters and the total sliding mass amounted to 100, 000 cubic meters. This site is situated at the ver tical crossing of highway route no 4.
Before the landslide, the small slope failure occurred under the influence of the rainfall of typhoon No.4 in the 29th, June, and this means the sign of the landslide.
This slope is composed of liparitic tuff affected by the hydro-thermal alteration and the weathered zone having some 10 or 15 meters depth contains the soft clay along joints.
The behavior of the landslide on the basis of data obtained by the contineous measurement of the displacement of the landslide and the point of the repaired construction are mentioned.
The difficulty of construction involves in the cutting of the toe of slope in the ac tive landslide as maintaining the stabil ity of slope.