Koharu Miyazawa is a Japanese voice actor and singer affiliated with the agency Music Ray'n. She was born in Chiba Prefecture on March 29, 1999. Her hobbies include reading and conversational English.

Miyazawa began her path to a career in the entertainment industry in 2017 after passing an audition conducted by Music Ray'n's parent company, Music Lane, and subsequently completed a training course with the agency in 2019. She made her debut as both a voice actor and singer in 2021. Her first major role, and a significant early career milestone, was providing the voice for the character Saki Shiraishi in the multimedia project Idoly Pride. This project included the television anime adaptation that began airing in 2021, as well as the related mobile game, marking her entry into virtual idol activities. In addition to her voice work for the character, she also contributed to the project's music by performing the anime's opening theme, ending theme, and insert songs.

Following her debut, Miyazawa has taken on a variety of roles across different media. Her anime credits include guest appearances in series such as My Daughter Left the Nest and Returned an S-Rank Adventurer in 2023, and roles in the second seasons of I've Been Killing Slimes for 300 Years and Maxed Out My Level and Aharen-san wa Hakarenai in 2025. Beyond animation, her work encompasses stage performances, including a role in the play "Battle Balls" in 2022, and participation in numerous reading plays. She has also lent her voice to character projects, narration for online content, and voice comics. Her activities include radio and online programming, such as appearing on the show "DayRe: no Re:Re:Re:Re:Re: Carnival!".