He is also known for several other roles such as Wataru Takagi and Genta Kojima in Detective Conan, Caiman in Dorohedoro, Eikichi Onizuka in Great Teacher Onizuka, Obito Uchiha in Naruto, Masaru Aoki in Hajime no Ippo, Knuckle Bine in Hunter × Hunter, Cubot in the Sonic the Hedgehog series and Garfield in The Garfield Show.
Wataru Takagi was born on July 25, 1966, in Chiba Prefecture.
Originally, Takagi wanted to be a stage actor but became disinterested in that particular career. He reoriented himself after seeing an advert on the Katsuta Voice Actor Academy and devoted himself to becoming a voice actor.
Takagi made his debut in 1987 as a voice actor in the TV anime Mister Ajikko although some sources claim that he made his debut in 1988. Since then, Takagi has appeared in multiple animes playing various roles. In 2002, Takagi associated himself with Kappei Yamaguchi and Tomokazu Seki to form a trio of voice actors named the "Sannin no Kai". Takagi expanded his activity to that of a stage actor. He also became the representative of the A Capella Club Theatrical Company.
In 2016, Wataru Takagi made his debut as a live-action actor and appeared in the TV Drama Sanada Maru as Oyamada Shigemasa. He's then taken several other live-action roles.