Yamamoto, Kenji

Kenji Yamamoto is a Japanese music composer and arranger who has been responsible for producing and composing soundtracks, including opening and ending sequence themes for various anime, tokusatsu and video game projects in the 1980s, 1990s, and 2000s. Most notably, he has worked on soundtracks of various Dragon Ball video games.

On March 9, 2011, Toei Animation publicly acknowledged that many of Yamamoto's musical works for the series infringed upon unidentified third-party copyrights. As a result, Toei removed Yamamoto and replaced his compositions for Dragon Ball Kai with those from the original Dragon Ball Z series written by Shunsuke Kikuchi.

(Source: Wikipedia)

Note: Not to be confused with another Kenji Yamamoto who is a manga artist.