Tatsuo Yamasaki, Japan’s former Vice Finance Minister for International Affairs, says the yen should be roughly 20% stronger than where it currently trades. For anyone holding Bitcoin or other risk assets, that’s not just a currency nerd’s hot take. It’s a flashing signal about one of the most important funding mechanisms in global finance.
Yamasaki pegs fair value for the dollar-yen pair somewhere around 120-130 JPY, a far cry from the 150 JPY neighborhood where the pair has been hanging out. In English: the yen is cheap, and the guy who used to run Japan’s currency intervention playbook thinks it shouldn’t be.
Why a Japanese bureaucrat’s opinion matters for crypto
The yen carry trade is one of the largest shadow leverage systems on the planet. Investors borrow yen at Japan’s rock-bottom interest rates, convert to dollars or other higher-yielding currencies, and deploy that capital into risk assets. Estimates suggest total yen carry-trade exposure runs into the trillions of dollars.
There is a documented correlation between yen short positioning and Bitcoin futures activity on the CME. A weaker yen has historically coincided with increased flows into risk-on assets like Bitcoin, because cheap borrowing costs make leverage irresistible.
