Interesting Japan Times article on raising bilingual kids. The keys are, according to the author:
- First and foremost, raising bilingual children requires "time... monumental effort and perseverance on the part of both parents; and... piles of money"
- Also beneficial are supportive relatives who can host the kids over summer holidays etc.
- And one parent having a fairly mobile job will make it easier to move between countries.
Seems pretty doable!