Yasunori Mitsuda
Hirota has a friendship from childhood with fellow composer Yasunori Mitsuda who he has worked with on ', "Biohazard 2" Drama Albums, "Shadow Hearts" and '. Under the direction of Mitsuda, "Street Fighter Alpha 3" was to have a "hard" sound, and "Biohazard 2" was to have an "ominous sound".