The Eleventh Child

The Eleventh Child is a drama film, directed by Dai Sijie and released in 1998. A coproduction of companies from Vietnam, France and Canada, the film stars Akihiro Nishida as Tang, a Vietnamese man who returns to his hometown upon learning that his brother is ill with leprosy. Community folklore holds when a family from the area gives birth to five sons and five daughters, they will gain the power to kill a large fish in the nearby lake whose flesh can cure the disease; Tang already has five sons and four daughters and his wife is pregnant once more, meaning that he may become the one who can fulfill the community's dreams.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.