Kentarō Hayami is a Japanese singer, actor, and voice actor. He was born on January 2, 1962, in Fukuyama, Hiroshima Prefecture, Japan, and his birth name is Atsuo Tanimoto. He is affiliated with the talent agency 81 Produce.

Hayami is perhaps best known in Japan for his music career, particularly his 1999 hit song Dango 3 Kyōdai. He has also performed theme songs for various series, including Chōriku Sentai O-Ranger, Mach Go Go Go, Mobile Police Patlabor, Iron Leaguer, and Ginga Sengoku Gunyūden Rai. He has been a guest on the NHK Educational channel program Okaasan to Issho.

As a voice actor, his roles include the Assistant Editor-in-Chief Yahagi in the anime Bakuman and the character Yuzuo Kinoshita in Happy Kappy. He also voiced the character Pteranodon in the anime work Anata o Zutto Aishiteru and is credited with the role of Zesta in the 2015 film The Adventures of Tyrano Boy.