Then it shoudn't be pubic domain because the author hasn't died over 50 years ago.
I have to disagree with you here, the current public domain laws, us or not, are basically the result of the walt disney company greasing the palms of american politicians, it was originally that 20 years had to pass if i remember right for something to enter the public domain, irrelevant of the person's living or dead status.
Also a person being alive does not count in whether something is applicable for the public domain or not, at least not a entertainment medium, this is why steamboat willy entered the public domain in 2024 (guess disney can't grease the palms enough anymore), the law is that after 95 years of publishing the work enters the public domain regardless of the status of the medium's creator, in entertainment properties at least.
What i believe your referring to is the law about inventions, intellectual property are not under the same classification as inventions, which i believe does have a date of death of the inventor clause, this has other problems with it like a company having essentially a monopoly on a invention for far longer than the 50 year limit because now "companies are people", but that's a entirely different topic.
Imo breath of fire 4 should have entered the public domain in 2023, 20 years after it's release, like the law used to be, but se la vie.
Keep in mind, THIS version of breath of fire 4 would not count in that, as it has changes to it and rereleases could fall under different laws, just the original disc version imo should be public domain.
Also this wouldn't allow say, square-enix to make a breath of fire game, that's a different law under the inventions side i mentioned, it however does have limitations.
For what it's worth, the modern mickey mouse enters the public domain in 2037.