I take it that currently the US would have no jurisdiction to seize assets from a Japanese company, in Japan, but if those assets are now held in the US, by a US company does that not open up that kind of situation?
To my understanding USD is always held in the US, banks in Japan or any other country have holdings accounts with US banks, so if you have a currency account in another country, the USD still are in the US, it only appears to you they're not.
https://bitcoinfoundation.org/blog/?p=63That's not strictly true, although it is the norm.
US dollar deposits held entirely outside the US have existed since the 60's and are called eurodollar deposits (regardless of whether they are actually physically located in Europe - although originally they invariably were). They were basically created to satisfy the Soviet governement's desire, during the cold war, to hold US$ funds in the Western financial system but outside the reach of the US government. These days eurodollar deposits are fairly routine (and similarly eurosterling deposit are sterling deposits held outside the UK, and euroeuro deposits (!) are Euro deposits held outside the EU.
roy