Seiichi Yamamoto (山本 精一, Yamamoto Seiichi, born July 16, 1958) is a Japanese musician.
He was a guitarist for the noise rock band Boredoms, and has released records both as a solo artist and with several other musicians and bands.
He has also composed the soundtracks to several films.
Yamamoto had left Boredoms prior to the release of Seadrum/House of Sun; the album contains samples of previously recorded guitar work.
In addition to performing in these bands, Yamamoto has collaborated with dozens of other bands of varying genres.