The musical score for "Mega Man 4" was composed by Minae Fujii, while the sound programming and sound effects were handled by Yasuaki Fujita, who had composed the soundtrack for "Mega Man 3" the previous year.
The musical score for "Mega Man 4" was co-composed by Yasuaki Fujita and Minae Fujii. The former of the two had composed the soundtrack for "Mega Man 3" the previous year.