Shinji Nishikawa, also known by the pen name MASH, is a Japanese artist. Nishikawa has worked as a designer on the majority of the Heisei and Millennium Godzilla films, starting with Godzilla vs. Biollante in 1989. In addition, Nishikawa has worked on non-Godzilla tokusatsu projects such as Toho's Rebirth of Mothra trilogy, and several recent entries in Tsuburaya Productions' Ultra series. Nishikawa has also illustrated Godzilla-related manga, such as Godzilla: Legend and the Monster King Godzilla manga that was serialized in TV Magazine. Based in Japan.