> There is no such thing as dual nationality in Japan. Kid is either
Japanese
> or not. I believe they will leave the kid Japanese, and the kid will get
to
> chose his/her nationality at age of 18. At least that is how we did it.


Not officially, but there is a number of them who have both nationalities.
You just stay mum and don't tell the Japanese government. They would always
use their Japanese passport here in Japan...


Sigi