On 25 November 1988, Miyano and Minato wandered around Misato with the intention of robbing and raping local women. At 8:30 p.m., they spotted Furuta riding her bike home after she had finished a shift at her job. Under Miyano's orders, Minato kicked Furuta off her bike and fled the scene. Miyano, under the pretense of witnessing the attack by coincidence, approached Furuta and offered to walk her home safely. Upon gaining her trust, he raped her in the warehouse, and again in a nearby hotel, threatening to kill her. From the hotel, Miyano called Minato and his other friends, Jō Ogura and Yasushi Watanabe, and bragged to them about the rape. Ogura reportedly asked Miyano to keep her in captivity in order to allow numerous people to sexually assault her. The group had a history of gang rape and had recently kidnapped and raped another girl, whom they released afterward. Around 3:00 a.m., Miyano took Furuta to a nearby park, where Minato, Ogura, and Watanabe were waiting. They had learned her home address from a notebook in her backpack and told her they knew where she lived, and that Yakuza members would kill her family if she attempted to escape. The four boys overpowered her, took her to a house in the Ayase district of Adachi, and gang-raped her. The house, which was owned by Minato's parents, soon became their regular gang hangout. On 27 November, Furuta's parents contacted the police about her disappearance. To discourage further investigation, the kidnappers forced her to call her mother three times to convince her that she had run away but was safe and staying with some friends. They also forced Furuta to stop the police investigation. When Minato's parents were present, Furuta was forced to act as his girlfriend. They dropped this pretense when it became clear that Minato's parents would not report them to the police. Minato's parents later claimed they did not intervene because they were afraid as their own son was increasingly violent toward them. On the night of 28 November, Miyano invited two other boys, Tetsuo Nakumara and Koichi Ihara, E and F, respectively, to the Minato house. They went to the upstairs room, where Junko was sitting, wearing a long-sleeved T-shirt and a skirt that Miyano had stolen from a clothing store a few days prior. They drank cough medicine, pretending it was drugs, and acted high.