Hiroko has done the following roles in audio drama.

Aika [CD]	Aida Rion
Angel Force [CD]	?
Fruits Basket [CD]	Honda Toru
Kyuukyoku Parodius [CD]	Mona
Madara -Ao Gilgamesh Saga [CD] {Vol 1}	jokan
Taiyou no Shoujo Inka-chan [CD]	Maya
Yuukyuu Gensoukyoku 3 Perpetual Blue [CD]	?