Ōku was born in Yokohama, Kanagawa.[2] In high school, she joined a rakugo group. While studying Politics and Economics at Meiji University, she was part of a student theatre troupe. After graduating, Ōku briefly had an office job at a subsidiary of the Ministry of Labour. She then entered a comedy acting school for one year and performed as stand-up comedian, and afterwards, at age 27, she entered Eigabi School, a film school where director Kiyoshi Kurosawa taught, among others.
While still at film school, Ōku won a screenwriting contest with a script that would become her theatrical feature film debut as director, Шаблон:Lang (Igaito shinanai, literally "don't die unexpectedly"). The film was released in 1999.[1] It is about an elementary school teacher troubled by pupils, parents, colleagues and a stalker.
Lost After School
Lost After School (original title Шаблон:LangHōkago rosuto) is an anthology film released in 2014 consisting of three episodes about high school girls.[2] The film is based on the shōjo mangaWorld Gaze Clips by Ran Igarashi.[3] Each episode was directed by a different female director, the other directors besides Ōku being Chihiro Amano and Ai Nagura.[2] Ōku's segment is titled Шаблон:Lang (baion, literally "overtones").
Fantastic Girls
Fantastic Girls (original title Шаблон:LangDērē gāruzu) was released in 2015.[2] It is adapted from the novel of the same title by Maha Harada. The word dērē in the title is Okayama dialect and means "very". The story is about two high-school friends in 1980 who reunite 30 years later.
Further films by Ōku include Шаблон:LangBijin ga konkatsu shite mitara / Marriage Hunting Beauty (2019, based on the manga by Arako Toaru) and Шаблон:LangWatashi wo kuitomete / Hold Me Back (2020, based on the novel by Risa Wataya).