Yumi Tamai is a Japanese actress, singer, and voice actor born in Tokyo on August 6, 1977. Her path to voice acting was unconventional; she initially studied architecture at Tokyo University of the Arts but left to pursue her artistic passions. A pivotal moment came when she completed an animation director training course organized by Hayao Miyazaki, which led directly to her selection for a prominent voice role in a Studio Ghibli film.

Her most iconic voice acting role is Lin in the acclaimed 2001 animated film Spirited Away. In the world of anime series, she is recognized for voicing the character Ishuu Benikawa in the 2008 fantasy series Xam'd: Lost Memories. Her filmography also includes a role in the 2012 animated film Fuse: Memoirs of a Hunter Girl.

Tamai's career is defined by its versatility across multiple artistic disciplines. In 1999, she co-founded the art and music performance group Psalm. She has also worked extensively as a singer, becoming a featured vocalist for the renowned band Shibusashirazu Orchestra in 2013 and later a permanent member. Her work in live-action film includes starring in, co-writing, and composing music for the 2006 film Monsen. Her performance in the 2012 film Not Long, At Night earned a nomination at the Tokyo International Film Festival. In addition to her screen work, she has appeared in theater productions and has worked as a radio personality. While her filmography shows collaborations with directors like Hayao Miyazaki and actors such as Atsushi Abe and Kenji Hamada on Xam'd: Lost Memories, these appear to be project-specific rather than evidence of long-term recurring partnerships.