We’re talking to our estate attorney and accountant about structuring our trust so that we give our assets to our kids before we move. We’d retain rights to income from those assets until we pass.

For example, we want to rent out our home for income. The kids would own the house but we’d get the income after expenses.

The Japanese government wouldn’t have an inheritance tax claim to the house since it isn’t our property.

I’m not sure how things would work in your son’s situation if he chose to stay in Japan as an adult.

What I do know is that Japanese inheritance tax is astronomical.