Hiroko has done the following roles in anime.

Armitage III	Armitage
Assemble Insert	Namikaze Maron
Bubble Gum Crisis {Episode 1}	Cynthia
Dancougar {God Bless Dancougar}	Laura
Debut	Fujimura Saori
Detonator Orgun	Kumi Jefferson/Mhiku
DNA^2	Kurimoto Ami
Dr. Rin ni Kiitemite! [2001-2002]	Hikari no Miko
Ginga Hyouryuu VIFAM [debut]	Kachua Piasun
Ginga Hyuouryuu Vifam 13 [1998]	Kachua Pearson
Handsome na Kanojo	Sawaki Aya
Hayou no Tsurugi	Shurain
Kindaichi Shounen no Jikenbo	Maria
Kurau: Phantom Memory	Jessica
Macross II	Ishtar
Magic Knight Rayearth	Hououji Fuu
Magical Angel Sweet Mint	Mint
Megazone 23 {part III}	Ryo
Musekinin Kanchou Tylor	Azalyn
Mushishi	Maho Matsuno
Oniisama he	Nanako
Rurouni Kenshin -Meiji Kenkaku Romantan-	Magdalia Sayo
Rurouni Kenshin -Meiji Kenkaku Romantan-	Magdalia Sayo
Seraphim Call [1999] {Episode 1,12}	Kurimoto Yukina
Takamaru	Small Tengu Jiro
Tokumu Sentai Shinesman	Kasahara Hitomi
Uchi no Tama Shirimasenka?	Tama
Ultimate Superman R	Sango
Ultimate Teacher	Shiratori
Vampire Miyu (TV)	Arisawa Miho
Yami to Boushi to Hon no Tabibito	Mariela
Yami to Boushi to Hon no Tabibito	Mau
Yami to Boushi to Hon no Tabibito	Konbiko