In Japan, junior high school is a pivotal time for students, as they transition from elementary school to a more rigorous academic environment. The 13-year-old age group is particularly vulnerable to various issues, such as:
| Date | Event | |------|-------| | | Mami attends an evening Enkō session; later that night she disappears after leaving the venue around 9 p.m. | | 14 Mar 2023 | Her mother files a missing‑person report; police begin a search in Sakai and surrounding neighborhoods. | | 16 Mar 2023 | Body discovered in a wooded area near the Kashiwanoha park, roughly 2 km from the Enkō venue. Autopsy confirms blunt‑force trauma and asphyxiation as cause of death. | | 18 Mar 2023 | Osaka Prefectural Police publicly name Kenji Sato as a suspect after locating his DNA on the victim’s clothing. | | 20 Mar 2023 | Sato is arrested on suspicion of murder and “indecent acts with a minor.” | | 2 Jun 2023 | Prosecutors file formal charges. | | 27 Oct 2024 | First trial begins at Osaka District Court. | | 15 Jun 2025 | Verdict: Sato found guilty of murder, indecent assault, and illegal detention. Sentenced to life imprisonment with 20 years of non‑parole eligibility. | | July 2025 | Appeal dismissed by Osaka High Court; sentence upheld. | Kansai Enko 1 Mami Chuu 1 13 Sai Shojo Soushitsu
Perhaps the most horrific detail emerged from the same interview: another girl's stepfather acquired a copy of the video she was in. His reaction was not to protect her, but to play the video for her and demand, "Let me do it, too." This story exposes the cycle of exploitation these girls were trapped in, where even their own homes were not safe. In Japan, junior high school is a pivotal
