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>if Japan is importing many goods and services, they need to pay them in USD and so they have to buy USD on the market.

Why does Japan need to pay them in USD?Because, as ArtTimeInvestor wrote,

> but the US still seems on top of its game.

Whatever the US sells, whether it be purely business/technology or even commingled with military resources, a lot of people in the world are interested in buying it.




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