Chihiro Kusaka is a Japanese voice actress born on December 9, 1978, in Iwate Prefecture. She is 173cm tall and affiliated with the talent management firm Production BAOBAB. Kusaka is a graduate of the Amusement Media Academy's voice actor department, completing her studies there in 1999. Early in her career, she worked under the stage name Shizuka Sasaki.

Kusaka's debut in anime was in the year 2000, providing a voice for the series The Celestial Legend Ceres under her former name, Shizuka Sasaki. She began building her filmography in the early 2000s with a variety of roles. In 2002, she voiced the character Tobuto Okazaki in the television anime Aterui. The following year, 2003, she took on two significant roles in the Sunrise production Shutsugeki! Machine Robo Rescue, providing the voices for both Kai Kitazawa and Makoto Aikawa. In the same year, she also had a role in the first season of the popular series Mermaid Melody: Pichi Pichi Pitch.

Her career continued through the 2000s with appearances in numerous series. Her credits from this period include roles in the second season of Mermaid Melody: Pichi Pichi Pitch and Otogi Zoshi in 2004, Idolmaster: XENOGLOSSIA in 2007, and Tegami Bachi: Reverse in 2010. Beyond television, her work extended to other media. In video games, she contributed to the Japanese dub of Crash Tag Team Racing. In the realm of audio drama, she played the role of Alphonse Elric in a drama CD for Fullmetal Alchemist.