Yūko Saitō is a Japanese voice actress, talent, and comedic performer born on March 9, 1960 in Kyoto Prefecture. She is affiliated with the talent management firm 81 Produce.

Her entertainment career began in 1982 when she debuted as a comedic performer under the stage name Yūko Saitō as a member of the Yoshimoto Kogyo agency. During this period, her thick-rimmed glasses became a trademark, and she appeared on numerous variety shows, including as a regular assistant on the popular program Waratte Iitomo! from 1982 to 1984. She also appeared in television dramas and commercials, such as a well-known advertisement for Seven-Eleven. After stepping away from the entertainment industry, she later returned to resume her career, this time focusing on voice acting.

Saitō’s voice acting work is closely associated with several long-running anime series for children. She is widely recognized for her role as Mimi in the Ojamajo Doremi magical girl franchise, a character she voiced across multiple installments, including the 1999 original series, its sequels Ojamajo Doremi #, Motto! Ojamajo Doremi, and Ojamajo Doremi Dokkaan!, as well as related drama CDs. Within the same series, she also provided the voice for Hazuki's grandmother, also known as Ichikawa Koyuki.

Saitō is also known for her long-standing role as Panda-kun in the Hamtaro franchise. She voiced the character across numerous series and films, including Tottoko Hamtarō in 2000, Tottoko Hamutarō: Hamu Hamu Land Daibōken, Tottoko Hamutarō: Ham Ham Ham - Jya! Maboroshi no Princess, Tottoko Hamutarō: Ham Ham Paradi-chu! Hamutarō to Fushigi no Oni no Ehonto, Tottoko Hamtarō Dechu, and multiple OVA films like Ham-chanzu no Takarasagashi Daisakusen and Ham-chanzu to Niji no Kuni no Ōji-sama.

Her other anime roles include Filleo Prince and Cloud’s Nanny in Yume no Crayon Oukoku, Guinn in the BS version of Taiyō no Ko Esteban, a brief role as a bully in Crayon Shin-chan, and an older woman in Love Com and Smile Pretty Cure!. Beyond animation, her work includes dubbing foreign media such as Cats & Company, where she voiced Riff Raff, and appearing in television dramas and films.