Yutaka Koizumi is a Japanese voice actor born on May 31, 1977, in Kanagawa Prefecture, Japan. He is affiliated with the talent management company Pro-Fit and is a fourth-generation graduate of the Pro-Fit Voice Actor's Training School.

Koizumi's career includes a range of supporting and lead roles in anime television series and films. One of his prominent early leading roles was as the protagonist Tatsuhiro Sato in the 2006 television series Welcome to the NHK. He also provided voices for several characters in the 2007 series Night Wizard The Animation, including Longinus and a character named Koizumi. His other television credits from this period include roles in Rizelmine, Romeo x Juliet, and B Gata H Kei.

Koizumi is perhaps best known for his role as the enigmatic antagonist Sanetoshi Watase in the 2011 surrealist series Penguindrum. He voiced additional characters in the same series, such as Doctor A and a history teacher. He later reprised the role of Sanetoshi Watase for the two-part Re:cycle of Penguindrum compilation films released in 2022. Another of his noted roles is Haruka Tsuchiya in the series Shiawase Sou no Okojo-san.

Throughout his career, Koizumi has taken on a variety of character types in numerous productions. His filmography includes parts in Orange, The Royal Tutor, King's Game The Animation, and the Strike Witches franchise. His work is primarily focused on anime television series and films. Information regarding specific awards or recurring creative collaborations with particular directors or studios is not documented in the available sources.