
Quick answer — Fumi Hirano voices Mother Okamura in Dareka no Manazashi, Hana in DAN DA DAN, Reiko Shimizu in Detective Conan: The Private Eyes' Requiem and 15 more characters.
Fumi Hirano voices Mother Okamura (Dareka no Manazashi), Hana (DAN DA DAN), Reiko Shimizu (Detective Conan: The Private Eyes' Requiem), Masako Saeki (Blue Period), Tokiko Tsukuyomi (TONIKAWA: Over The Moon For You Season 2), Reimi Akizuki (The Garden of Words), Touko Awamiya (Dark Gathering), Ruba (The Weakest Tamer Began a Journey to Pick Up Trash) and 10 more.
Mother Okamura is voiced in Japanese by Fumi Hirano.