Checking over at the US embassy website, it says that a male must be eighteen and the female sixteen years of age. Now, if Genma and Soun (and perhaps Nodoka) bothered with a ceremony, one might assume that both Ranma and Akane were old enough to marry. However, the site says that performing wedding ceremonies does not accomplish the recognition of a lawful marriage.
That's applies to the present. What I'm wondering is whether or not those conditions were different back when the Ranma 1/2 manga series was completed, as well as when it began. It's not for the sake of making sense of it as it is shown in the manga, but so it can be used in a plot device if the characters' ages, and thus the time that they can marry, play an important role in how events play out in fan-fiction.





