EUR/JPY fell on Wednesday from just under 185.00 to 182.05, then rebounded to 183.40. Moves in other Yen pairs were also reported, raising suspicion of action by Japan’s Ministry of Finance.
Japan does not comment on currency operations, but Bank of Japan data released last week indicated the ministry may have used 5.48 trillion Yen (USD 35 billion) to support the Yen last Thursday. A former Japanese official also warned of possible further action during the Golden Week holiday.
Intervention Risk Back In Focus
Finance Minister Satsuki Katayama repeated this week that Tokyo would act against speculative Yen selling. She said “decisive measures” would be taken in line with a statement signed with the United States last year, at an Asian Development Bank meeting in Uzbekistan.
Attention now turns to Euro area data, including Germany and Eurozone final HCOB Services PMI readings for April and March PPI figures. In Japan, Labour Cash Earnings and the minutes from the Bank of Japan’s latest policy meeting are due in Thursday’s Asian session.
As we see EUR/JPY trading near the 195.50 level, the risk of intervention from Japanese authorities feels very familiar. We are reminded of the events around this time in May 2025, when a suspected intervention pushed the pair down by three hundred pips in a matter of hours. The current high levels present a similar setup for another sharp, sudden move.
Looking back at the data from the 2025 intervention, we saw the Ministry of Finance deploy an estimated ¥5.48 trillion to defend the currency. That action showed a clear willingness to spend significantly to curb what they called speculative moves against the Yen. This historical precedent is the most important factor for traders to consider right now.
The fundamental picture continues to support a weak Yen, which only increases the tension. The interest rate differential remains wide, with the ECB’s policy rate at 3.0% while the Bank of Japan’s rate is only at 0.5%, encouraging carry trades that sell the JPY. Recent Eurozone core inflation data holding firm at 2.7% suggests the ECB will be slow to cut rates further, keeping this pressure on.
Options Volatility Likely To Rise
For derivative traders, this means we should expect a significant increase in implied volatility for Yen pairs. During the intervention period in 2025, one-month implied volatility on USD/JPY jumped from around 8% to over 12%, making options much more expensive. A similar spike is likely now, so positioning before volatility rises further is key.
This environment suggests that buying downside protection, such as EUR/JPY put options, could be a prudent strategy. These positions would benefit directly from a sudden, intervention-driven drop in the exchange rate. The cost of these options will rise as intervention fears grow, rewarding those who act preemptively.
