LIGHT DISTRIBUTION CONTROL DEVICE, VEHICULAR LAMP SYSTEM, AND LIGHT DISTRIBUTION CONTROL METHOD

A light distribution control device 6 controls a variable light distribution lamp 2 capable of irradiating a forward area with a visible light beam L1 having a variable intensity distribution, on the basis of images IMG repeatedly obtained from an imaging device 4. The light distribution control device 6 controls the variable light distribution lamp 2 to form a light distribution pattern corresponding to a plurality of pieces of first light distribution pattern information based on the images IMG, the plurality of pieces of first light distribution pattern information including, when the images IMG include a predetermined light spot, a light-shielded area defined on the basis of the light spot, and not including the light-shielded area when the images IMG do not include the light spot.