
Quick answer — Megumi Kojima voices Sachiko Kawamura in NANA, Lanhua in Mermaid Melody: Pichi Pichi Pitch Pure.
Megumi Kojima voices Sachiko Kawamura (NANA), Lanhua (Mermaid Melody: Pichi Pichi Pitch Pure).
Sachiko Kawamura is voiced in Japanese by Megumi Kojima.