The most amusing thing about Japan's censorship law, to me, is that it kind of contrasts with at least one or two yearly cultural celebrations. The Kanamara Matsuri - better known as the Penis Festival outside of Japan - is one such event that puts dicks on public display. This happens every year in Kawasaki and has a history that goes back hundreds of years as a time when sex workers would pray at the shrine for health and protection from disease, though these days it's more about preventing the spread of HIV. It gets its moniker as the Penis Festival, due to the three very large penis shrines that are paraded around the festival grounds. One is made of black iron, one is pink, and the oldest of them is made of wood.
The Hounen Matsuri is another such event that is similarly themed (and also known as the Penis Festival), which takes place two or three weeks prior to the Kanamara Matsuri. This one is supposed to primarily focus on fertility rather than the penis specifically, but you wouldn't get that impression if you're ever in attendance - the parade includes a penis of truly massive proportions. It does have a focus aligning with sexuality rather than simply focusing on the dick, but the sheer amount of dicks made from various materials is insane, and there's loads (no pun intended) of artwork, also celebrating the cock. Both festivals also feature lots of different food options, most of which are presented in the relevant form.
So yeah, I'm pretty amused that they have that kind of censorship requirement.