An analysis device includes: an acquirer that is configured to acquire data in which a physical quantity is associated with each unit area acquired by dividing a three-dimensional space, a three-dimensional time space, or a four-dimensional time space； a setter that is configured to set a detection region in a time space of three or more dimensions in the space or the time space and is configured to set a control region at a position surrounding a gap with the gap surrounding the detection region disposed in a space having the same dimensions as those of the detection region； and a determiner that is configured to determine whether or not one or more unit areas included in the detection region are predetermined areas on the basis of comparison between physical quantities of one or more unit areas included in the detection region and the control region set by the setter.
