The president of Studio 4C an animation studio she founded with Koji Morimoto and Yoshiharu Sato in 1986. Tanaka is also the chief executive officer of a production company called Beyond C which initiated the project with Michael Arias that became Tekkon Kinkreet. Tanaka was an executive producer on Tekkon Kinkreet and Mind Game both Studio 4C films. She was also an animation producer on Beyond and The Second Renaissance Part 1 for the Animatrix project. Tanaka previously worked with Studio Ghibli and played the role of line producer on My Neighbor Totoro and Kikis Delivery Service.