Forward monitoring device and forward monitoring method

A forward monitoring device to be installed on a train, the forward monitoring device comprising:

• map information storage circuitry to store track information representing a location and a track geometry of a track on which the train is to run;
• train information acquisition circuitry to obtain train location information on the train;
• and
• interceptor presence-absence determination circuitry to determine, on a basis of the track information, the train location information, and interceptor candidate information, whether there is an interceptor between the train and a first monitoring scope, when the forward monitoring device monitors an obstacle on the track in the first monitoring scope, the interceptor being not the obstacle, the interceptor blocking a view of the first monitoring scope from the train, the interceptor candidate information indicating candidates for the interceptor that blocks a view from the train, the first monitoring scope including a spot on the track at a first distance from the train along the track in a travelling direction of the train.