A distribution controller (141) distributes a live video provided from a streamer to a viewer terminal having a comment area, the comment area allowing a predetermined number of comments to be displayed. A receiver (120) receives a comment posted from the viewer terminal during distribution of the live video. A sender (110) sends a comment that the receiver (120) received to the viewer terminal to cause the comment to be added to the comment area in a last-in-first-out manner. An identifier (144) identifies a comment to which the streamer reacted in the live video being distributed by, every time the streamer speaks, comparing a speech text, the speech text being acquired by subjecting speech of the streamer to speech recognition, with respective comments currently being displayed in the comment area. A display controller (145) controls display of the identified comment.