1. A vehicle surroundings display unit, comprising: a pick-up unit configured to pick up a video of vehicle surroundings; an approaching vehicle sensor configured to sense, based on the video picked up by the pick-up unit, an approaching vehicle which is approaching a subject vehicle; a display processor configured to perform an operation to display the approaching vehicle sensed by the approaching vehicle sensor while distinguishing the approaching vehicle from an obstacle which is not approaching the subject vehicle; a display unit configured to display the video which has undergone the displaying operation by the display processor; and a frequency decomposing unit configured to make the following operations detecting one or more frequencies: decomposing a time-varying component of one or more pixels of the picked-up video for each of the one or more frequencies, extracting one or more pixels having a frequency of the time-varying component higher than a certain frequency, and of the thus extracted one or more pixels of the picked up video, displaying the extracted one or more pixels in a vehicle area.