
Quick answer — Shidou Nakamura voices Ryuk in Death Note: Relight, Jed in Hunter x Hunter: The Last Mission, Saga in One Piece: The Curse of the Sacred Sword and 1 more characters.
Shidou Nakamura voices Ryuk (Death Note: Relight), Jed (Hunter x Hunter: The Last Mission), Saga (One Piece: The Curse of the Sacred Sword), Zero (Pokémon: Giratina and the Sky Warrior).
Ryuk is voiced in Japanese by Shidou Nakamura.