Koroshi no rakuin
Tags: revenge, psychedelic, murder, violence

Plot synopsis:
Goro Hanada, the Japanese underworld's third-ranked hitman, and his wife, Mami, fly into Tokyo and are met by Kasuga, a formerly ranked hitman turned taxi driver. Kasuga petitions Hanada to assist him in breaking back into the profession. Hanada agrees and the three go to a club owned by the yakuza boss Michihiko Yabuhara. The two men are hired to escort a client from Sagami Beach to Nagano. After the meeting, Yabuhara covertly seduces Hanada's wife.
Hanada and Kasuga pick up a car designated for the job which unexpectedly has a corpse in the back seat. They dispose of the body, then meet the client and proceed towards their destination. En route Hanada spots an ambush. He dispatches a number of gunmen while Kasuga panics and flails about in hysterics. Foaming at the mouth, Kasuga charges an ambusher, Koh, the fourth-ranked hitman, and they kill each other. Hanada leaves the client to secure Koh's car but hears three gunshots and rushes back to find the client is safe and three additional ambushers have been shot cleanly through the forehead. At a second ambush, Hanada kills more gunmen and sets Sakura, the second-ranked hitman, on fire. Sakura madly rushes towards the client but is shot dead by him. On his way home Hanada's car breaks down. Misako, a mysterious woman with a deathwish, stops and gives him a ride. At home, he has rough sex with his wife, fueled by his obsession with sniffing boiling rice.
Yabuhara hires Hanada to kill four men, the first three being a customs officer, an ocularist and a jewellery dealer. Hanada snipes the first from behind a billboard's animatronic cigarette lighter, shoots the second from a basement up through a pipe drain when the latter leans over the sink and, ordered to finish quickly, blasts his way into the third's office and escapes on an advertising balloon. Misako then appears at his door and offers him a nearly impossible contract to kill a foreigner, which he cannot refuse having just been told the plan.
During the job a butterfly lands on the barrel of his rifle causing him to miss his target and kill an innocent bystander. Misako tells him that he will now lose his rank and be killed. Hanada makes plans to leave the country but is shot by his wife, who then sets fire to their apartment and flees. His belt buckle, however, stopped the bullet and he escapes the building.
He finds Misako and they go to her apartment. After alternating failed attempts by him to seduce her and them to kill each other. she succumbs to his advances when he promises to kill her. Afterwards, he finds he cannot as he has fallen in love with her. In a state of confusion he wanders the streets and passes out on the side of the road. The next day he finds his wife at Yabuhara's club. She tries to seduce him, then fakes hysteria and tells him Yabuhara paid her to kill him and that the three men he had killed had stolen from Yabuhara's diamond smuggling operation, and the foreigner was an investigator sent by the supplier. Unmoved, Hanada kills her, gets drunk and waits for Yabuhara to return. Yabuhara arrives already dead with a bullet hole through the centre of his forehead.
Hanada returns to Misako's apartment where a film projector has been set up. It depicts Misako bound and tortured and directs him to a breakwater, where the following day he is to be killed. Hanada submits to the demand but kills the killers instead. The former client arrives and announces himself as the legendary Number One Killer. He says he will kill Hanada but, in thanks for the work he has done, is only giving a warning at present.
Hanada holes up in Misako's apartment and Number One begins an extended siege, taunting Hanada with threatening phone calls and forbidding him to leave the apartment. Eventually, Number One moves in with the now exhausted and inebriated Hanada under the pretext that he is deciding how to kill him. They agree to a temporary truce and set times to eat, sleep and, later, to link arms everywhere they go. Number One suggests they eat out one day and then disappears during the meal.
At the apartment, Hanada finds a note and another film from Number One stating he will be waiting at a gymnasium with Misako. Hanada waits at the gymnasium but Number One does not show. As a bedraggled Hanada rises to leave, a tape recorder switches on explaining, "This is the way Number One works", he exhausts you and then kills you. Hanada puts a headband across his forehead and climbs into a boxing ring. Number One appears and shoots him. The headband stops the bullet and Hanada returns fire. Number One slumps to the ground but manages to shoot him a few times before dying. Hanada leaps and staggers around the ring declaring himself the new Number One. Misako enters the arena and, crazed, he instinctively shoots her dead, then falls from the ring.