Shikibu monogatari (1990)

Toyoichi Otomo suffers from psychological and spiritual troubles after a horrific industrial accident. He lives with his elderly mother and wife near Mt. Aso in rural Kyushu. He seeks solace in a small religious group run by Buddhist nun Chishu-bo who claims to be the 68th descendant of famed 11th century poet Izumi Shikibu. The members of her sect regard her as a living saint. Yet instead of balming his soul, she riles his libido by playing a sexual cat-and-mouse game with the fragile Toyoichi. When she does bed him, it leads to a miracle healing -- followed by a terrible calamity.