Flowers of Flesh and Blood

Guinea Pig 2: Flower of Flesh and Blood is a 1985 Japanese splatter horror film written and directed by Hideshi Hino. The second film in the Guinea Pig film series, it is based on a manga by Hino, and stars Hiroshi Tamura and Kirara Yūgao. The film's plot concerns a man dressed as a samurai who drugs and kidnaps a woman, and proceeds to take her to his home, where he dismembers her and adds her body parts to a collection.

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

Poster © the film's rights holders.