Abstract: To provide a recording/playback system capable of improving the accuracy of image adjustment for playing back a video content recorded in a recording medium. A recording/playback system relating to the present invention includes a recording unit and a playback unit. The recording unit determines, as adjustment parameters, control values for controlling values to be output in response to input of recorded pieces of video data included in a video stream each having a predetermined period and having a luminance level that has not yet been adjusted. The recording unit records the determined adjustment parameters and pieces of time information in correspondence with each other. The pieces of time information indicate timings for applying the adjustment parameters to the pieces of original video data. The playback unit outputs the values for playing back the pieces of original video data based on the adjustment parameters recorded in the recording unit.