1. A vehicle surroundings display unit, comprising: 1) a pick-up unit for picking up a video of vehicle surroundings; 2) an approaching vehicle sensor for sensing, based on the video picked up by the pick-up unit, an approaching vehicle which is approaching a subject vehicle; 3) a display processor for displaying the approaching vehicle sensed by the approaching vehicle sensor while distinguishing the approaching vehicle from an obstacle which is not approaching the subject vehicle; 4) a display unit for displaying the video which has undergone the displaying operation by the display processor; and 5) a frequency decomposing unit configured to make the following operations: i) decomposing a time-varying component of a pixel of the picked-up video for each frequency, ii) extracting the pixel having a frequency of the time-varying component higher than a certain frequency, and iii) of the thus extracted pixels of the picked up video, displaying the pixels in a vehicle area.