A former Bank of Japan official warned this week that Japan and the US may intervene again if the yen continues to slide. The warning comes as the yen remains under pressure, and any joint action by the two central banks could destabilize global markets — including crypto.
The warning from a former BoJ official
The former official, who spoke on condition of anonymity, said that both Japan and the US are prepared to step into currency markets if the yen's decline accelerates. The two countries have a history of coordinated intervention, most recently in 2024, and the official suggested that another round is possible if the yen breaches key levels.
“They won't hesitate to act if they think the move is disorderly,” the former official said, according to sources familiar with the remarks. The comment underscores growing concern in Tokyo and Washington about the yen's weakness and its broader economic impact.
Why joint intervention matters for crypto
Joint currency interventions by Japan and the US could have a direct effect on crypto markets. The yen is a key funding currency for carry trades, where investors borrow cheaply in yen to buy higher-yielding assets — including cryptocurrencies. A sudden intervention that strengthens the yen could unwind those trades, triggering forced selling and adding volatility.
Bitcoin and other digital assets have become increasingly sensitive to macro moves. A sharp yen rally could spill over into crypto, especially if it coincides with a broader risk-off shift. The former official's warning is a reminder that crypto doesn't exist in a vacuum — central bank actions in traditional markets can ripple through quickly.
What traders are watching now
The yen is still sliding, and the market is on edge. Traders are eyeing the next Bank of Japan policy meeting and any verbal intervention from officials. The former BoJ official's comments add to the sense that the window for action is narrowing.
For crypto holders, the takeaway is straightforward: keep an eye on the yen. If Japan and the US do step in, the fallout could hit digital assets faster than many expect.
