Taboo

Gohatto , also known as Taboo, is a 1999 Japanese film directed by Nagisa Ōshima. Its subject is homosexuality in the Shinsengumi during the bakumatsu period, the end of the samurai era in the mid-19th century. The production was Õshima's final film before his death, thirteen years after Gohatto's premiere.

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

Poster © the film's rights holders.