According to the 2021 amendment to the Juvenile Law of Japan, 18- and 19-year-old offenders are categorized as “specified juveniles,” and the disclosure of their real names to the public is legalized. In the light of this amendment, this study aimed to examine the factors that determine support for real name reporting of specified juveniles. We set up a hypothetical model based on the supposition that support for real name reporting is determined by the perceived importance of juvenile responsibility and rehabilitation, and that these perceptions, in turn, are determined by the perceived seriousness of the consequences of crime. Multilevel structural equation modeling that assumed the individual level (N = 2,591) and the crime type level (N = 60) supported the model at the individual level. However, at the offense level, the relationship between support for real name reporting and the perceived importance of juvenile responsibility and rehabilitation was not significant, rendering partial support for the model.