An analysis apparatus according to an embodiment includes processing circuitry. The processing circuitry performs registration between first ultrasound image data obtained at a first phase by an ultrasound diagnostic apparatus and first medical image data obtained by a medical image diagnostic apparatus other than the ultrasound diagnostic apparatus and performs registration between the first ultrasound image data and second ultrasound image data obtained at a second phase different from the first phase by the ultrasound diagnostic apparatus, to generate second medical image data registered with the second ultrasound image data； and combines the second ultrasound image data and the second medical image data to generate a single image, thereby performing registration between ultrasound image data by the ultrasound diagnostic apparatus and medical image data by the medical image diagnostic apparatus.
