edit: thanks to the dead commenter for clarifying. that sucks.
edit: thanks to the dead commenter for clarifying. that sucks.
[1] https://standardebooks.org/ebooks/tanizaki-junichiro/short-f...
It’s based on both. For example, a translation or other derivative work whose copyright expired “early” in the US due to non‐renewal would still be encumbered by the copyright of the original. That’s basically what happened to It’s a Wonderful Life—the film is technically in the public domain, but is still held in Paramount’s iron grip by way of the renewed copyright of the original short story.
In Japan, the term of copyright protection will, in principle, be 70 years after the death of the author (or 70 years after publication for works published anonymously, under a pseudonym, or in the name of a corporate body).
Copyrights that have already expired at the time of enforcement will not be revived (principle of non-retroactivity of protection).
Consequently, no works will newly enter the public domain for the next 20 years.
From Japan Library Association: https://www.jla.or.jp/hogokikan-encho/#:~:text=%E4%BF%9D%E8%...