Faelco on 26 June 2018
The age of consent in Japan is 18. The national law (13) only applies on 2 inhabited islands. The rest of Japan applies regional laws, which are (almost?) everywhere 18 years old. The "romantic relationships" stuff is if the 2 people involved are below 18. It doesn't mean that the law is always enforced, but it's 18 in it.
My Japanese girlfriend is 19 so she's not technically an adult here (it's 20, mostly for marriage, alcohol and global responsibility), so I checked quite a lot to be sure that I wouldn't be in trouble.
