CONTROLLER AND CONTROL METHOD

The present disclosure obtains a controller and a control method capable of improving safety of a lean vehicle. In a controller () and a control method according to the present disclosure, an execution section of the controller () executes a first operation as an operation that causes a lean vehicle () to execute a cruise control based on a positional relationship information between the lean vehicle () and a preceding vehicle preceding the lean vehicle (). When a speed information, which is information about a speed of the lean vehicle () and is acquired during the first operation, indicates that the lean vehicle () is decelerated to a reference speed, the execution section executes, instead of the first operation, a second operation as an operation that causes the lean vehicle () to execute the cruise control regardless of the positional relationship information.