
Quick answer — Hirasawa performed 1 anime theme, including "Aria" from Berserk: The Golden Age Arc III - The Advent.
Hirasawa performed the anime theme songs "Aria" (Berserk: The Golden Age Arc III - The Advent).
Hirasawa's first listed anime theme is "Aria", the opening of Berserk: The Golden Age Arc III - The Advent.