Dollar being the world's reserve currency is for the most part the exception.I think the reason Nikkei went up is more to do with global inflation than currency depreciation. If you believe "a country's currency drops, index (usually) rises", why did USD and SPX both went up in the last 2 years? SPX should have dropped. We're just in a period of anomaly due to COVID. Just my useless 2-cents.
Anyway, USD/JPY ain't going any higher. And if there's BOJ intervention, I hope you know what to do.
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Look at Euro and Dax. And many others besides Yen and Nikkei/Topix that are export driven.
As for UJ going higher or not I'll let the market tell me. Ain't going higher/lower (will, always, never etc) are not in my vocabulary.



