A first information communication device is provided with: a biological information acquisition unit that acquires biological information of a first user holding the first information processing device； a mood determination unit that detects a state in which the mood of the first user is estimated as being good on the basis of the biological information； a reason estimation unit that, in a case where a state in which the mood of the first user is estimated as being good is detected, estimates a reason for the mood of the first user being good on the basis of behavior history information indicating a behavior history of the first user； and a transmission control unit that causes a communication unit to transmit reason information indicating the estimated reason, to a second information processing device held by a second user who wishes to be notified of a timing for contacting the first user.
