Koji Haramaki is a Japanese voice actor born on January 28, 1971, in Kanagawa Prefecture, Japan. He is affiliated with the talent management firm Aoni Production. Haramaki has a height of 166 centimeters and a weight of 60 kilograms. His career as a voice actor spans from the late 1990s to the present, with performance credits recorded as early as 1999 and as recently as 2024.

Among his major voice roles, Haramaki is known for providing the Japanese voice of Ma Chao. In the anime series The King of Fighters: Another Day, he voiced the character Soiree Meira. For Persona 4: The Animation, he played the role of Taro Namatame. Additionally, he voiced the character Mohsen in the film Sinbad: Night at High Noon and the Wonder Gate.

Information regarding recurring collaborations with specific directors, studios, or fellow voice actors is not available in the provided search results. Likewise, specific awards, nominations, or other notable achievements in his career cannot be confirmed from the available information.