Koji Hajima is an orchestral conductor for Square Enix. He served as the primary conductor for a number of soundtracks and orchestral pieces across the series.
On September 28th 2005, Hajima conducted the orchestra and Nobuo Uematsu's band, Black Mages, in the Final Fantasy VII: Advent Children version of Uematsu's One-Winged Angel to create Advent: One-Winged Angel.
|Dirge of Cerberus -Final Fantasy VII- Original Soundtrack||Conductor|
|Final Fantasy VII: Advent Children OST||One Winged Angel - Conductor|
|Final Fantasy VIII: Original Soundtrack||Ending Theme - Conductor|
|FITHOS LUSEC WECOS VINOSEC: Final Fantasy VIII||Conductor|
|Final Fantasy IX: Original Soundtrack||Conductor|
|Final Fantasy X: Original Soundtrack||Recording conductor|
|Final Fantasy X-2 Original Soundtrack||1000 Words Orchestra Version - Recording Engineer|