Tsuyoshi Sekito (関戸 剛, Sekito Tsuyoshi, born April 3, 1963) is a Japanese video game composer, arranger, and musician who has been employed at Square Enix since 1995. As a composer, he is best known for scoring Brave Fencer Musashi (1998), Final Fantasy VII: Advent Children (2005) and The Last Remnant (2008). He also plays the guitar in the rock bands The Black Mages and The Star Onions; both groups arrange and perform compositions from the Final Fantasy series.