Takehito Koyasu
Dio has had many different voice actors in different types of media. He was first voiced by Norio Wakamoto in the 1992 drama CDs, followed by Nobuo Tanaka in the OVAs and Isshin Chiba in the 1998 video game. He is voiced by both Kenji Nojima and Hikaru Midorikawa in the "Phantom Blood" video game and as the younger and older incarnations, respectively. In the 2012 television anime and in all subsequent media, he is voiced by Takehito Koyasu.