Atsushi Mimura, Japan’s Vice Finance Minister for International Affairs and top foreign exchange official, said he will closely monitor foreign exchange markets. He declined to comment on intervention or specific currency levels.
He said he has daily contact with US authorities and that they are aware of his views. He added that the IMF classification of a free-floating regime does not limit how often Japan can intervene.
Yen Moves And Official Messaging
At the time of writing, USD/JPY was trading around 156.30, down 0.08% on the day. Mimura also said he would not comment on forex rates.
The Bank of Japan is Japan’s central bank and aims for price stability, with an inflation target of around 2%. It issues banknotes and carries out currency and monetary control.
In 2013, the BoJ began an ultra-loose policy using Quantitative and Qualitative Easing, buying assets such as government and corporate bonds. In 2016, it added negative rates and yield control on 10-year bonds, then lifted rates in March 2024.
BoJ stimulus weakened the yen, with further falls in 2022 and 2023 as other central banks raised rates. The policy shift in 2024 partly reversed that trend, after inflation moved above 2% alongside a weaker yen and higher global energy prices.
Options Volatility And Intervention Risk
With USD/JPY now trading at 162.50, we see that the warnings from officials are becoming more frequent, much like they did back in 2025. These statements are a clear signal that the Ministry of Finance is uncomfortable and verbal intervention is the first line of defense. The market is being put on notice that one-way bets against the yen will face resistance.
This constant threat of sudden government action means implied volatility on USD/JPY options will likely remain elevated. For derivative traders, this makes selling short-dated yen puts an extremely risky strategy, as a surprise intervention could cause a sharp drop in the pair. Instead, buying options to protect against or profit from these sudden moves is the more prudent approach in the coming weeks.
Looking back, the Bank of Japan’s slow move away from its ultra-loose policy has only brought its key rate to 0.50%, which is still minor. The interest rate difference with the US, where the Fed funds rate is now 3.75%, remains the primary driver pushing the yen lower. This underlying pressure suggests that any intervention-driven yen strength may be temporary.
We remember the large-scale interventions in the spring of 2024, where authorities spent an estimated ¥9 trillion to support the currency when it crossed the 160 level. This history shows they have a pain threshold and are willing to act decisively, even if the effects don’t last forever. The current level puts us firmly back in that same territory, making a repeat action highly probable.
Therefore, using derivatives to structure trades with defined risk is critical right now. Buying JPY call options (or USD/JPY put options) offers a direct way to profit from a potential intervention with limited downside. This strategy acts as a hedge against long USD/JPY positions or as a standalone speculative bet on the Ministry of Finance stepping in.
Japan’s core inflation, which registered 2.4% for April 2026, continues to run above the bank’s target, adding another layer of complexity. While this supports the case for further BoJ rate hikes later this year, it does little to solve the immediate problem of currency weakness. For now, the focus should be on the government’s actions, not just the central bank’s slower policy adjustments.
