Knowing how ambiguous Japanese is, I decided to look up Finance Minister Yosano’s comment where he was supposed to have claimed “unshakable” faith in the dollar as reserve currency. Here’s the actual quote, followed by a very literal translation to show the ambiguity:
国際通貨体制の見直し論が一部の国で出ていることについて、与謝野財務相は「あらゆる面から考えて基軸通貨がドルであり続けることは確信しており、いささかも揺らいでいない」とした。
“Concerning contentions about revising the international currency system that are being aired in certain countries, Finance Minister Yosano stated, ‘Considering this matter in all aspects, we are confident that the dollar will continue as reserve currency, and in this we are not wavering at all.’”
“Will continue” means, as it does in English, that it will continue for some amount of time beyond the present. There is nothing in Yosano’s statement to pin him down if the dollar retained its reserve status for another half year, then collapsed - since it would be continuing for another six months from now.
So basically, his statement means absolutely nothing, other than that he is absolutely sure the dollar won’t collapse today. In that, he is “unshakable.” Notice the sentence split, where he adds “in this we are not wavering at all.” It’s tacked on and adds nothing to the first part of the sentence, except dramatic flair. He goes out of his way to use the present progressive tense, which is inherently provisional when contrasted with the simpler-to-use present tense “we do not waver at all.” The latter would at least imply some slight amount of future extension to the earlier statement. Again, he says nothing of substance.
That is quite different from having straight-up unshakable faith in the dollar, which would imply that the dollar will continue as reserve currency for a very long time. No such message is in Yosano’s statement