From the Super Mario Wiki
Takashi Nagasako (長嶝 高士, Nagasako Takashi) is a Japanese voice actor currently employed at Arts Vision. He was born February 24, 1964 in Wakayama Prefecture.
In Mario games, Nagasako is most notable for voicing Donkey Kong, taking over for Grant Kirkhope. Long before voicing his usual Donkey Kong, Nagasako also voiced Ganondorf in games like The Legend of Zelda: Ocarina of Time, The Wind Waker, Super Smash Bros. Melee and Super Smash Bros. Ultimate.