This study investigated the trends in school bullying from 2017 to 2022 by focusing the frequencies of occurrence. During this period, a series of surveys was conducted, in which a total of 23,704 Japanese students from fifth to ninth grades participated. The findings revealed a decrease in the overall prevalence of school bullying; however, incidents of high-frequency bullying victimization did not exhibit a similar decline. This suggests that high-frequency bullying victimization is both more prevalent and persistent than less frequent occurrences, underlining that frequent bullying remains a significant concern among Japanese students.
Shu et al. (Mon,) studied this question.