Information processing device and vehicle

In order to suppress deterioration of a fuel cell and secure output of the fuel cell, an information processing device and a vehicle are provided with: an acquisition unit that acquires use history information indicating a use history of the vehicle for a plurality of items relating to a reduction in output of the fuel cell; a derivation unit that derives an output reduction amount for each item on the basis of the acquired information and output reduction characteristic information indicating the output reduction characteristic of the fuel cell for each item; a factor-by-factor output reduction amount estimation unit that estimates an output reduction amount for each output reduction factor on the basis of the derived output reduction amount for each item and output reduction factor information indicating the output reduction factor of the fuel cell for each item; and a control unit capable of executing, on the basis of the estimated output reduction amount for each output reduction factor, control for incre