
Quick answer — Asumi Nakata worked on Mermaid Melody: Pichi Pichi Pitch Pure (Theme Song Performance), Mermaid Melody: Pichi Pichi Pitch (Theme Song Performance).
Asumi Nakata worked on Mermaid Melody: Pichi Pichi Pitch Pure (Theme Song Performance), Mermaid Melody: Pichi Pichi Pitch (Theme Song Performance).