Aki Nakajima is a Japanese voice actress born on December 9, 1987, in Tokyo, Japan. She is affiliated with the talent agency Ken Production. She has an identical twin sister, Hiro Nakajima, who is also a voice actress, and the two have worked together as a twin unit.

Nakajima is a graduate of the Tokyo Animator College. She made her debut as a voice actress while still a student, playing the role of Pikari Hime in the television anime Shampoo Oji. A significant step in her early career was winning the second Seiyu Awards Newcomer Discovery Audition, an achievement that led to offers from seven different agencies and ultimately resulted in her joining Ken Production.

Nakajima has built a career with a variety of roles in anime, video games, and foreign language dubbing. In anime, she is known for her role as Uru Harune in the 2011 series Pretty Rhythm Aurora Dream. Her other notable anime roles include Lerajie in Shakugan no Shana III (Final), Takatsuki Koutarou in The IDOLM@STER, and Procyon in Little Charo ~Touhoku-hen~. She has also appeared in series such as Chihayafuru, Blue Exorcist, Bunny Drop, and A-Channel. Her filmography includes roles in the video games Final Fantasy XIII-2 and Lightning Returns: Final Fantasy XIII.

Beyond anime and games, a substantial part of Nakajima's work is in voice-over dubbing for foreign films and television series. Her credits in this field include playing Carl and Beth in the Japanese dub of The Walking Dead, as well as roles in Homeland, Revenge, and the Disney Channel series Jonas L.A. and Good Luck Charlie. She has also performed in numerous stage plays, primarily in small theaters. Her other activities include voice work for comic books and serving as a narrator and announcer for various programs and events. Her listed special skills include judo, in which she holds a black belt (shodan), and playing the electone.