
Quick answer — Keisuke voices Mr. 7 in One Piece: The Desert Princess and the Pirates, Adventures in Alabasta, Kamakiri in One Piece: Episode of Skypiea.
Keisuke voices Mr. 7 (One Piece: The Desert Princess and the Pirates, Adventures in Alabasta), Kamakiri (One Piece: Episode of Skypiea).
Mr. 7 is voiced in Japanese by Keisuke.