Abstract: An aspect of the invention relates to a robot including an operation determining unit that selects an operation of the robot, a drive mechanism that executes the operation selected by the operation determining unit, a body temperature detecting unit that detects a basic body temperature of a user, and a physical condition determining unit that determines a physical condition of the user based on a basic body temperature cycle of the user. When the basic body temperature of the user reaches a predetermined consideration timing in the basic body temperature cycle, the robot changes an amount of activity thereof.

Abstract: A robot has a horn (gripping portion). A main body portion of the robot includes a direction determining unit that determines a direction of movement, a drive mechanism that executes a determined movement, a power supply unit that supplies power to the drive mechanism, and an interrupting mechanism that interrupts a supply of power from the power supply unit when the horn (gripping portion) is pulled out. When the horn is pulled out, a spring terminal and a conductor change to a state of non-contact, and a power line is physically disconnected, because of which the robot performs an emergency stop.

Abstract: Empathy toward a robot is increased by the robot emulating human-like or animal-like behavior. A robot includes a movement determining unit that determines a direction of movement, a drive mechanism that executes a specified movement, and a familiarity managing unit that updates familiarity with respect to a moving object. The robot moves away from a user with low familiarity, and approaches a user with high familiarity. Familiarity changes in accordance with a depth of involvement between a user and the robot.

Abstract: Empathy toward a robot is increased by the robot emulating human-like or animal-like behavior. A robot includes a movement determining unit that determines a direction of movement, an action determining unit that selects a gesture from multiple kinds of gesture, and a drive mechanism that executes a specified movement and gesture. When a user enters a hall, an external sensor installed in advance detects a return home, and notifies the robot via a server that the user has returned home. The robot heads to the hall, and welcomes the user home by performing a gesture indicating goodwill, such as sitting down and raising an arm.