Age of consent nationally was 13, but most prefectures had raised the age to at least 18 many, many years earlier. Specifically, most of the local prefecture laws outlawed sexual acts that were judged to be indecent between adolescents (those under 18) and adults. 46 of the 47 prefectures had adopted local laws to outlaw this behavior by the end of the 1980s. The last one (Nagano Prefecture) adopted laws to outlaw this behavior in 2016.
For reference, this array of local laws is referred to as Seishōnen Hogo Ikusei Jōrei, which can be translated to “Bylaws for Protecting and Nurturing Adolescents”.
Age of consent nationally was 13, but most prefectures had raised the age to at least 18 many, many years earlier. Specifically, most of the local prefecture laws outlawed sexual acts that were judged to be indecent between adolescents (those under 18) and adults. 46 of the 47 prefectures had adopted local laws to outlaw this behavior by the end of the 1980s. The last one (Nagano Prefecture) adopted laws to outlaw this behavior in 2016.
For reference, this array of local laws is referred to as Seishōnen Hogo Ikusei Jōrei, which can be translated to “Bylaws for Protecting and Nurturing Adolescents”.