モノリスソフト
In 2002, Mitsuda composed the score to Monolith Soft's "Xenosaga Episode I: Der Wille zur Macht", the spiritual prequel to "Xenogears", also directed by Tetsuya Takahashi. Joanne Hogg returned to sing the soundtrack's vocal themes, while the instrumental tracks were performed by the London Philharmonic Orchestra. Monolith Soft did not ask Mitsuda and Hogg to reprise their roles for "Episode II" and "Episode III", however.