As you can see the EURJPY vols in the front end are spiking higher on the back of the rising geopolitical tensions. While our models are showing this as expensive (as you would expect) we should point out that prior to the great financial crisis in 2007/2008 EURJPY vol moved up in a step-like formation and then went ballistic as the S&P crash got into full swing. Our models are good at picking up vol mean reversion, but less accurate if we are in the early stages of a major geopolitical or financial crisis. With this in mind, the safest way too short EURJPY vol in our view is via selling EURJPY call spreads, i.e sell 2M 40 delta EUR call and buy a 25 delta EUR call vs JPY.