Robert Waterman, born November 20, 1984, in Tokyo, is a Japanese actor and voice actor known for his deep voice and imposing physique. He began his performing career in 2007 at the prestigious Actors' Seat training institute before joining the Genki Entertainment Theatre troupe in 2008. Since 2011, he has been affiliated with the agency Power Rise, focusing primarily on acting and voice work.

Waterman has built a diverse portfolio of anime voice roles. He is perhaps best recognized as the voice of Kenta Fujiwara in the comedy series Grand Blue Dreaming, a role he has reprised across multiple seasons including the third season announced for 2025. His other notable anime credits include Dada Silva in Blue Lock, Funga Baraki in Go! Go! Loser Ranger!, Behemolt in Welcome to Demon School! Iruma-kun, Aruterio Marchen in The 8th son? Are you kidding me?, and various roles in Sword Art Online, SSSS.DYNAZENON, and Hortensia Saga. In addition to anime, his voice work extends to video games such as Fate/Samurai Remnant, Monster Strike, and Quiz RPG: The World of Mystic Wiz.

Beyond voice acting, Waterman has a background in music. He was the second lead vocalist for the heavy metal band LIGHTNING and is a member of V.S UNION, a group known for performing anime-style songs. He has also remained active in stage theatre, appearing in productions including A Midsummer Night's Dream. His work as a narrator for commercials and government projects further demonstrates the range of his vocal talents.