Electrified aircraft and regenerated electric power control method for electrified aircraft

[Problem] To provide electrified aircraft such that the path angle and rate of descent can be controlled independently of speed and with high response by operating the drag of a propulsion drive system whereby electric power generated during descent or in an updraft can be maximized safely in various flying states, and to provide a regenerated electric power control method for the electrified aircraft. [Solution] This electrified aircraft is provided with: a propeller for propulsion; an electric drive motor for rotatably driving the propeller and generating electricity by the rotation of the propeller; and an estimation unit that estimates the drag of the propeller or a fan on the basis of a propulsion system parameter of the electric drive motor.