Tetsuya Kobayashi (小林 哲也, Kobayashi Tetsuya, August 17, 1980) is a Japanese composer, arranger, lyricist and music producer from Nagano Prefecture. He commonly nicknamed Kobatetsu (コバテツ). He currently belongs to the "miuG" sound section of G-angle Co.

He specializes in producing music that incorporate various elements such as classical music, jazz, pop and metal, and in recent years has been producing works in a wide range of genres, including sound production, composition, arrangements, lyrics, anime musical accompaniment, theme songs, insert songs and music for video games.