A right of adaptation is one of the copyrights granyed to an author of
a work under the Copyright Act of Japan. When you say a "right of
adaptation" in Japan, the right usually means the one provided for
in the provision of Art. 27 of the Copyright Act of Japan. Under the provision,
an author of a workhas the exclusive right to translate, arrange musically or transform a pre-existing work,, or dramatize, cinematize or otherwise adapt a pre-existing work, which means that the author of a pre-existing work (an original work) has the right of creating a “derivative work.” The
term “derivative work” under the Copyright Act of Japan means
a workcreated by translating, arranging musically or transforming a pre-existing work(an original work), or dramatizing, cinematizing or otherwise adapting a pre-existing work(an original work). And in connection with the exploitation of a derivative work, theauthor of its original work has exclusive rights of the same types as those owned by theauthor of the derivative work.Consequently, if you want to usea derivative work from an original work, you must obtain permission from both the copyright owner of the original work and of the derivative work.
[Note] The term "copyrights” ususally meanseconomic rights which enable the author to exclusively authorize others to use his/her
work commercially, usually under particular terms and conditions.
Adapting something from an original work (e.g. adapting a novel to make
a motion picture, rewriting for children a book intended for adults) is
usually understood to create another work (original work) independently
of creating its original work. However, if you adapt something from an
original work without permission from the author (copyright owner) of the
original work, that constitutes an act of infringement of the copyright
to the original author.
It is accepted globally that translations, adaptations, arrangements of
music and other alterations of a literary or anartistic work should be protected without prejudice to the copyright in
the original work, and the author of the original work should enjoy the
exclusive right of making derivative works from his/her original.
Kaneda Copyright Agency
For proper copyright management in Japan