An ultrasound diagnosis device includes a controller. The controller is configured to: calculate a feature related to an ultrasound signal, based on the ultrasound signal received from an observation target； estimate a physical quantity of scattering bodies included in the observation target, by using: a relation derived based on a known physical quantity of an object and a feature obtained from the object, the object including scattering bodies having the known physical quantity； and the calculated feature of the observation target； and generate information to be displayed on a display, the information including a result of the estimation.
