Kozue Saitō is a Japanese actress, voice actress, and blues singer who was born on September 30, 1967 in Kokubunji, Tokyo. She is affiliated with the talent agency Production Ace. Her career in entertainment began at a very young age when she joined the Wakakusa Theater Troupe at three years old. She rose to national fame as a child actor, most notably for playing the lead role of the young Hatoko in the 1974 NHK morning drama series Hatoko no Umi, a performance that made her a household name in Japan. Around the same time, she also found success as a singer with the hit children's song Tsutomu-kun from the Yamaguchi Family.

As a voice actor, Saitō has contributed to a wide range of anime series and film dubs. She is known for providing the Japanese voice of Rachel in the live-action film series, appearing in Sonic the Hedgehog, Sonic the Hedgehog 2, and Sonic the Hedgehog 3. Her other notable anime voice roles include the Eternity Devil in the popular series Chainsaw Man, a nurse in Jujutsu Kaisen, Takeuchi in Tengoku Daimakyo, and Mrs. Collins in takt op.Destiny. She also voiced Guixiang Lee in Shenmue the Animation, the Cosmic Pig Host in The Little Lies We All Tell, and Uranaishi in Somali and the Forest Spirit. In addition to these, her film and television dubbing work includes roles in the Japanese language versions of Hidden Figures and Parasite.

Beyond her voice work, Saitō has maintained a diverse career as a stage actress and blues singer, a journey that began when she moved to the United States to study at the State University of New York. While in New York, she joined a church choir, which inspired her to start performing as a blues singer. She has also worked as a lecturer at the YOU Voice Actors Studio, helping to train the next generation of voice actors. Her long and varied career in the entertainment industry, from celebrated child star to accomplished voice actor and blues musician, is marked by her resilience and adaptability.