Quick answer — Houko Kuwashima performed 1 anime theme, including "Watashi Rashiku" from Martian Successor Nadesico.
Houko Kuwashima performed the anime theme songs "Watashi Rashiku" (Martian Successor Nadesico).
Houko Kuwashima's first listed anime theme is "Watashi Rashiku", the ending of Martian Successor Nadesico.