Mari Okada is a Japanese screenwriter, director and manga artist. She is one of the most prolific writers currently working in the anime industry. She won the 16th Animation Kobe Award.

Maquia: When the Promised Flower Blooms is a 2018 Japanese animated high fantasy drama film written and directed by Mari Okada and produced by P.A. Works. It features animation direction and character designs by Yuriko Ishii adapted from Akihiko Yoshida's original designs, and music composed by Kenji Kawai. The film is Okada's directorial debut and the first standalone feature-length, theatrically-released production of P.A. Works.