The Vice Chairperson and Chief of the CEO's Office of controversial "new religious movement" Happy Science and eldest daughter of its leader, Ryuho Okawa. Mother of two children.

Sayaka is heavily involved in assisting her father with running the organization. She has also written various books and given lectures.

She's sung on and composed songs for various image and theme songs for Happy Science movies, including both the Japanese and English theme songs for the movie The Real Exorcist. She's also been involved with music creation for other aspects of the organization, including children's songs and the "cheering song" for Happy Science's political party, the Happiness Realization Party.

Sayaka has been the screenwriter for various Happy Science live action movies. Her first screenwriting credit for a Happy Science anime movie was 2021's The Laws of the Universe: The Age of Elohim.

(Source: Happy Science Japanese website, edited) Edit Biography