Mitsuo has done the following roles in audio drama.

Aa Megami-sama Tokuten Ou [CD]	Nezumi-san
Guy Brave [CD]	Ken
Happy Boy [CD]	Kitsune
Kimagure Orange Road Original [CD]	Komatsu Seiji
Koko wa Green Wood [CD]	Ikeda Mitsuru
Tengai Makyou [CD] {Volume 1}	?