Hiroki Takahashi is the name of two Japanese artists. - Hiroki Takahashi (高橋 広樹), born September 7, 1974, is a Japanese voice actor, known for roles such as Katsuya Jonouchi (Yu-Gi-Oh: Duel Monsters), Superbi Squalo (Katekyo Hitman Reborn!), Japan (Axis Powers Hetalia), Impmon (Digimon Tamers), Hisoka (Hunter X Hunter), and Eiji Kikumaru (Prince of Tennis). Besides singing image songs for various anime, he and fellow voice actor Shotaro Morikubo have a group project, Heart-Beat; their solo mini-albums under the project were released under the names of Show (Morikubo) and Hero (Takahashi). - Hiroki Takahashi (高橋 洋樹), birth date unknown, is a Japanese anison (artist who performs music for animation almost exclusively) musician, best known for singing the opening theme song of Dragonball, "Makafushigi Adventure." <a href="https://www.last.fm/music/Hiroki+Takahashi">Read more on Last.fm</a>. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.