so the legal age of consent in japan is actually not 13 at all and I hate seeing that argument brought up over and over again. So here's the thing the legal age of consent in Japan is not set federally but each prefecture is allowed to set it individually but the LOWEST they are allowed to set it as is 13. NO prefecture has the age of consent set to lower than 16 with most of them having it set at 18 and the prefectures that have it set at any lower having active lobbying happening to have it raised to 18.
TLDR
the legal age of consent being 13 in Japan is a myth perpetuated for obviously shitty reasons. It takes literally five minutes of googling to disprove it so please stop believing other people when there's an obvious agenda behind telling you there's a country where it is somehow okay to have sex with children.