“…Regarding juvenile delinquency research, there are mainly two types of research: investigations of people who are in a juvenile classification home or juvenile detention school (Brennan, Breitenbach, & Dieterich, 2008) and investigations of students who have experienced problem behavior through population-based research (Godleski, Eiden, Shisler, & Livingston, 2020), including school-based research (Booth, Farrell, & Varano, 2008). Obokata and Muto (2006a) examined mild delinquency, which was defined by observing behaviors of students who attended junior high school, such as smoking. In order to focus on the acts observed in students who attend school, their definition of "mild delinquency" was adopted in this study.…”