Sekito joined Squaresoft in 1995 after working for Konami and worked on several games created by Hideo Kojima. His first important assignment for Square was the re-scoring of Final Fantasy II's original soundtrack for the Final Fantasy Origins release of the game. Sekito, called Square-Enix's "King of Rock", has contributed rock arrangements and compositions for Romancing SaGa: Minstrel Song, Final Fantasy VII: Advent Children, Dawn of Mana, as well as many other titles of renown. He is also the guitarist of the Final Fantasy XI arrangement band, the Star Onions.