ハセガワダイスケ (Daisuke Hasegawa)

Daisuke Hasegawa is a Japanese singer-songwriter best known internationally for lending his voice to anime opening themes. He performed «Great Days», the third opening theme for JoJo's Bizarre Adventure: Diamond is Unbreakable, alongside Karen Aoki, and later sang «Traitor's Requiem» («裏切り者のレクイエム»), the second opening for JoJo's Bizarre Adventure: Golden Wind. Both themes became instantly recognizable to fans of the long-running manga and anime franchise, thanks to their dramatic, high-energy rock-pop arrangements matched to the show's flamboyant visual style.

His music sits comfortably within Japanese pop-rock, favoring soaring vocal melodies and driving guitar-and-synth production suited to anime soundtrack work. «Traitor's Requiem» in particular has circulated widely online in multiple versions — including English and instrumental renditions, plus fan edits tied to the show's characters Diavolo and Giorno — a testament to how deeply the track resonated with the JoJo fanbase beyond Japan.

While detailed biographical information about Hasegawa outside his anime tie-in work is limited internationally, his contributions place him among the notable voices behind the JoJo's Bizarre Adventure musical identity, a franchise celebrated for pairing its bold storytelling with equally bold, genre-blending theme songs.