Sensor unit

A sensor unit comprising:

• a sensor that is attached to a measurement target object that deforms in response to being swung by a user, the sensor being configured to generate an output signal indicating a relationship between time and a physical quantity related to an amount of deformation of the measurement target object;
• a feature value generation circuit comprising a storage medium configured to store a first mass of the measurement target object and an elastic modulus of the measurement target object, the feature value generation circuit being configured to:
• calculate a first force that the user applies to the measurement target object at a specific time, on the basis of the output signal, the first mass, and the elastic modulus;
• and
• generate a feature value on the basis of the output signal, the feature value being a parameter indicating a feature of the swing and including the first force at the specific time;
• and
• a transmitter that is attached to the measurement target object and that is configured to transmit the feature value to an external device by wireless communication or wired communication.