Koji Haramaki (服巻 浩司 Haramaki Koji) is a Japanese voice actor affiliated to Aoni Production.
- Mirai Sentai Timeranger vs Kyukyu Sentai GoGoV - Voice of Real
- One Piece - Voices of various characters
- Digimon Story: Cyber Sleuth - Voice of Dynasmon
- Bobobo-bobo - Voice of Pikari
- Sonic X - Voice of Jerome Wise
- Dynasty Warriors - Voice of Ma Chao
- Persona 4: The Animation - Voice of Taro Namatame
- He has a cousin, Yukari Tamura, a fellow voice actress that known for her role as Nanoha Takamichi in Magical Girl Lyrical Nanoha.
- Koji gave Yuhki Satoh (the voice of Ultraman Cosmos) the nickname "big brother" as a tribute to their roles as twin brothers in the 2004 video game KOF: Maximum Impact. Koji also noted that the video game was their second time working together after the end of Ultraman Cosmos.
- Koji Haramaki's article in Wikipedia (Japan)
- Koji Haramaki's profile in Aoni Production
- Koji Haramaki in Anime News Network