MISFIRE DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE, MISFIRE DETECTION SYSTEM FOR INTERNAL COMBUSTION ENGINE, DATA ANALYZER, CONTROLLER FOR INTERNAL COMBUSTION ENGINE, METHOD FOR DETECTING MISFIRE IN INTERNAL COMBUSTION ENGINE, AND RECEPTION EXECUTION DEVICE

A misfire detection device for an internal combustion engine includes a storage device and processing circuitry, the storage device stores first mapping data corresponding to a case where a warm-up process of a catalyst provided in an exhaust passage of an internal combustion engine is being executed, and second mapping data corresponding to a case where the warm-up process is not being executed, and each of the first mapping data and the second mapping data uses a rotation waveform variable as an input and defines a mapping that outputs a misfire variable that is a variable related to a probability misfire has occurred. The rotation waveform variable is a variable indicating a difference between a plurality of values of an instantaneous speed variable respectively corresponding to a plurality of different minute angular intervals.