An ultrasonic observation includes a frequency analyzer that analyzes a frequency of an echo signal received from an ultrasonic probe for transmitting an ultrasonic wave to a subject and receiving the ultrasonic wave reflected from the subject, to calculate a frequency spectrum, a feature data calculator that calculates feature data reflecting a frequency spectrum shape specific to an artificial material, and an artificial material-highlighted image data generator that generates, based on the feature data, an image in which the artificial material is highlighted.
