Sasaki Tomoko

 is a Japanese composer, arranger, lyricist, voice actress, and member of Serani Poji.

She is best known for her work in video game soundtracks such as SEGA's Nights into Dreams series and several songs for the iDOLM@STER series.

She sometimes works under the name TOKYO HEIDI when collaborating with her younger sister, illustrator Sasaki Wakaba (ササキワカバ).