Miki Sakai is a Japanese actress and singer whose work has primarily been in live-action film and television, though she has taken on several notable voice acting roles in anime. Born on February 21, 1978, in Shizuoka Prefecture, Japan, she began her career as a teenager before transitioning into a wide range of acting projects.

Her career in voice acting, while limited compared to her on-screen work, includes performances in significant anime and animated films. She is known for providing the voice of Fuyumi in the romantic drama series Saikano (also known as She, The Ultimate Weapon). Another prominent voice role is as Tomie Kawakami in the horror film Tomie: Rebirth, which is part of a film series based on the manga by Junji Ito. Her filmography also lists a role as Adelle Bascùd in the 2003 animated feature One Piece: Dead End no Bôken. Beyond these specific credits, she remains primarily active as a live-action actress, with a career that began in the early 1990s and continues with roles in contemporary dramas and films.