Complex sentence: Ansem is voiced by Akio Ōtsuka in the Japanese version of the series while the English version has the character originally voiced by Billy Zane in "Kingdom Hearts" and now by Richard Epcar in all subsequent releases/remakes.
Split into simpler sentences: Ansem is voiced by Akio Ōtsuka in the Japanese version of the series. In the English version, the character was originally voiced by Billy Zane in "Kingdom Hearts" and now by Richard Epcar in all subsequent releases/remakes.