Inheritance tax and re-entry permit

[Deep Blue]

So if you are right, it is even worse than I thought. The GOJ will try to tax me for ten years, though I am living abroad, and my inheritance will come from somebody else living abroad?

No. This ten year rule only applies to Japanese who move abroad. It won’t apply to you.

[needhelp]

OK, got it. Thanks.
But just for curiosity's sake, how can they find out that a Japanese citizen living abroad for, say, 9 years, and not planning on returning, had an inheritance from, say, a foreign national spouse? Does the GOJ have access to all the bank accounts of all their citizens living abroad, even permanent residence of other countries?