Kiyomi Asai is a Japanese voice actress born on April 12, 1974, in Tokyo, Japan. She is affiliated with the talent agency D-Color. Asai began her career in 1997 and has been active in the industry since. Throughout her career, she has also worked under several pseudonyms, including Don Ohana, Kiyosato Otomo, Yuria Hokuto, Shinya Aizaki, and Remi Haruno, particularly for her work in adult games.

Asai's interest in voice acting was sparked during her childhood when she watched the animated film Nausicaä of the Valley of the Wind. She was a member of a children's theater group in her youth, which led to her formal debut as a voice actress in 1997 with a role in the television anime Flame of Recca.

She has built an extensive filmography across television anime, original video animations, and video games. Some of her most recognized and long-running roles include Hanabi Hyuga in the Naruto series, a role she has played for many years and reprised in Boruto: Naruto Next Generations and the film The Last: Naruto the Movie. She is also known for her role as July in the Darker than Black series. In the Bleach anime, she voiced the character Lilynette Gingerbuck.

Asai has voiced numerous other characters, demonstrating her range across different genres. Her television anime roles include Ganko Morikawa in Flame of Recca, Mayuko Asano in Great Teacher Onizuka, Tart in Tokyo Mew Mew, Seiko in Saikano, Miyu Greer in the My-HiME and My-Otome series, Izumi in Kannazuki no Miko, Epona in Tears to Tiara, and Matori in the Pokémon series. In the original video anime (OVA) format, she has appeared in titles such as The Cosmopolitan Prayers and the Akane Maniax series.

Asai has also been a prominent voice in video games, often credited under her pseudonyms. Notable game roles include Ayu Daikuuji in Rumbling Hearts and its related works, Irma Thesleff in Muv-Luv, Ranmaru in Sakura Wars V, and Penny in WarioWare: Smooth Moves. She was part of the voice actress duo UYAMUYA with Kozue Yoshizumi, formed for the web anime AyuMayu Theater, in which they voiced the main characters Ayu Daikuuji and Mayu Tamano.

In addition to her work in anime and games, Asai has contributed to Japanese dubs of foreign films and television series. Some of her dubbing roles include providing the Japanese voice for the title character in the 2004 DVD edition of Casper, as well as roles in The Amityville Horror, Almost Famous, and the television series Charmed and The Sopranos.