Hiroshi Tamaki is a Japanese actor and singer who was born in Nagoya, Japan, on January 14, 1980. He began his entertainment career in 1998 after being discovered by a talent agent while still in high school, making his debut in the drama Am I Weird?. Tamaki's career is primarily centered on live-action roles in film and television. He gained widespread recognition for his portrayal of Shinichi Chiaki in the popular 2006 drama series Nodame Cantabile, a role that became a hallmark of his career. His work in film includes appearances in the Waterboys movie and its subsequent television series, as well as starring roles in the Nodame Cantabile feature films and the live-action adaptation of The Way of the Househusband.

While Tamaki is principally known as a live-action actor, his filmography includes voice work, most notably dubbing foreign-language productions for the Japanese market. He has provided the Japanese voice for actor Chris Pratt's character Owen Grady in all three films of the Jurassic World series. He also dubbed the voice of Alex the Lion, originally voiced by Ben Stiller, in the Madagascar animated film series.

In the realm of original Japanese animation, Tamaki has contributed his voice to projects based on the popular children's television program Synapusyu. He voiced the character Nyū, described as a towel fairy, in the 2023 film Synapusyu The Movie: Pusu Hoppe Nyu World. He reprised this role for the 2025 sequel, Synapusyu The Movie: Pusu Hoppe Dancing Party, where he was credited as a special appearance. Information regarding recurring collaborations with specific voice actors or directors, as well as major industry awards for his voice work, is not documented in the available sources. His voice acting contributions represent a facet of his broader career as a leading figure in Japanese entertainment.