Natsumi has done the following roles in audio drama.

Arashi no Destiny [CD] {Volume 2}	?
First Kiss Monogatari [CD]	?
Kouda Mariko no Radio Canvas Special [CD]	?
Kyuukyoku Parodius [CD]	Tako A
Sotsugyou Cross World All Stars On Stage [CD]	Ryuuzaki Youko
Twinbee Paradise [CD] {Ao to Hai Iro no Sora de}	child
Valkyrie Profile Voice Mix Arrange [CD]	Nanami