If Japanese law actually functions that way, they have their own set of issues.
It looks like you already researched the case, but that is absolutely true too, for some definition of CP. I have talked to Japanese people about this (various demographics, not just creepy otaku) and they often didn't understand why we consider someone having nude pictures they didn't create as on the same level as production of CP or child rape. I sometimes try to explain the slippery slope, how just participating in the groups that circulate that shit fuels supply, or how people who assault children are always found with CP - but I'm not gonna try to change their culture. Every country has its own peculiarities. (Japan will harshly punish people who distribute any porn without the mosaic.)
I'm more concerned with the woke clown world stuff in the west, or places like France that ban paternity tests.
It looks like you already researched the case, but that is absolutely true too, for some definition of CP. I have talked to Japanese people about this (various demographics, not just creepy otaku) and they often didn't understand why we consider someone having nude pictures they didn't create as on the same level as production of CP or child rape. I sometimes try to explain the slippery slope, how just participating in the groups that circulate that shit fuels supply, or how people who assault children are always found with CP - but I'm not gonna try to change their culture. Every country has its own peculiarities. (Japan will harshly punish people who distribute any porn without the mosaic.)
I'm more concerned with the woke clown world stuff in the west, or places like France that ban paternity tests.