Hiroshi has done the following roles in audio drama.

Cobalt Tokimeki Drama CD Remix [CD]	?
Kanon [CD]	Kuse
Macross Frontier [CD]	Michel Blanc
Neko na Kankei [CD]	Samejima Tetsugaku
Pani Poni Dash [CD]	Inugami Tsurugi [1D]
Sotsugyou Cross World All Stars On Stage [CD]	Reporter
Twinbee Paradise [CD] {Ao to Hai Iro no Sora de}	maintenance worker