Abstract: An information processing system operable to effectively promote a conversation, including starting and activating a conversation between avatars in the virtual space, for example by generating a terminal output image showing a virtual space including an avatar associated with each user; outputting text information or voice information perceptible by each user together with the terminal output image based on a conversation-related input from each user associated with an avatar in the virtual space; specifying, for a conversation established between users based on the text information or the voice information, a theme of the conversation based on the conversation-related input; and performing theme information output processing for making theme information indicating the previously-specified theme of the conversation be included in the terminal output image.