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 OF 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 mapping data. The mapping data is data specifying a mapping that outputs a misfire variable using a rotation waveform variable as an input. The misfire variable is a variable related to a probability that a misfire has occurred in the internal combustion engine. The rotation waveform variable is a variable based on an instantaneous speed variable corresponding to each of discontinuous rotational angle intervals selected from multiple continuous rotational angle intervals.