Quick answer — "Hohoemi no Bakudan" by Matsuko Mawatari is the opening theme of Yu Yu Hakusho: Ghostfiles.
"Hohoemi no Bakudan" by Matsuko Mawatari is the opening theme of Yu Yu Hakusho: Ghostfiles.
"Hohoemi no Bakudan" is performed by Matsuko Mawatari.