Koichi Yamadera (山寺 宏一) is a Japanese voice actor. She was born on 17th June 1961 in Shiogama, Miyagi Prefecture, Japan. Koichi Yamadera is known for Magica Wars (2014), Lupin the Third Part 4 (2015), Shōwa Genroku Rakugo Shinjū (2016), The Dragon Dentist (2017), Fist of the Blue Sky Re: Genesis (2018), Carole & Tuesday (2019), My Hero Academia 4 (2020), Mars Red (2021), Detective Conan (2022) and Baki Hanma Season 2 (2023).

Koichi Yamadera father name is N/A and his mother name is N/A. His marital status is married and Koichi Yamadera wife name is Robin Shoko Okada ​