Her other roles include Amara Aquilla/Magma from X-Men Evolution, Rosy from Hamtaro, Nana from Meltylancer, Nicole from Sabrina, the Teenage Witch, the maniacal Yagami from Maison Ikkoku, Paradice from Ōban Star-Racers, Momiji the Red Priestess from InuYasha, Kumomo from Mirmo!, Tray from The Uglydoll Show, and Twist from My Little Pony: Friendship Is Magic.
Takahashi worked with clockwork regularity in getting her manga out, garnering numerous fans, several deals for overseas publications, and contracts for many of her most popular works to be made into anime, including Urusei Yatsura, Ranma 1/2, and Inuyasha.
In both InuYasha and Hamtaro, Cathy provides the voice for the mother of Moneca Stori's character.
It has also been used in various Japanese animation; including Inuyasha, Urusei Yatsura, Sekirei, Aku no Hana, and Yu Yu Hakusho.
Shimazu is notable for having had voice roles in all four of the major anime TV series based on the works of Rumiko Takahashi - she played Shinobu Miyake in Urusei Yatsura, Sayako Kuroki in Maison Ikkoku, Kodachi Kuno in Ranma ½, and Abi-hime in InuYasha.
She is best known to many Rumiko Takahashi fans as the voices of Kasumi Tendo from the Ranma ½ series and Kikyo from the InuYasha series, both of who are from Takahashi's manga.