Quick answer — Matsuko Mawatari performed 1 anime theme, including "Hohoemi no Bakudan" from Yu Yu Hakusho: Ghostfiles.
Matsuko Mawatari performed the anime theme songs "Hohoemi no Bakudan" (Yu Yu Hakusho: Ghostfiles).
Matsuko Mawatari's first listed anime theme is "Hohoemi no Bakudan", the opening of Yu Yu Hakusho: Ghostfiles.