Summary:Japan flags speculative FX moves driving yen volatilityFinance Minister Katayama signals readiness to interveneAuthorities monitoring markets with “extremely high vigilance”Government reiterates BOJ independence despite geopolitical tensionsKihara stresses inflation should be wage-driven, not cost-pushComments come amid heightened global volatility and weaker yenReinforces intervention risk without signalling policy shiftJapanese officials have stepped up verbal intervention on currency markets, warning of speculative-driven moves in the yen while reaffirming the government’s readiness to act against excessive volatility.Finance Minister Katayama said foreign exchange fluctuations were being driven in part by speculative activity, adding that authorities were closely monitoring developments with an “extremely high level of vigilance.” She reiterated that Japan stands prepared to take “necessary actions at any time” to address disorderly market conditions, reinforcing a familiar policy stance aimed at stabilising the currency.The remarks come as the yen trades under renewed pressure amid heightened global uncertainty, including energy-driven inflation risks linked to the Middle East conflict. Japanese policymakers have historically been sensitive to sharp currency moves, particularly when weakness risks feeding into import costs and inflation.At the same time, Chief Cabinet Secretary Minoru Kihara emphasised that monetary policy decisions remain firmly within the remit of the Bank of Japan, underlining that the government’s stance on central bank independence remains unchanged, even in the current geopolitical environment. He declined to comment on how upcoming BOJ decisions, including those at the April meeting, could influence price dynamics.Kihara also reiterated the government’s broader policy preference for sustainable inflation driven by wage growth rather than cost-push factors such as higher energy prices, highlighting a key distinction shaping Japan’s policy framework.Together, the remarks suggest a coordinated but measured approach: authorities are signalling heightened sensitivity to currency volatility and maintaining intervention optionality, while avoiding any direct pressure on the BOJ to alter its policy path.---Still to come, BoJ meeting, previews:BOJ’s Ueda says inflation rising toward 2% ahead of policy meeting - recapJapan officials signal vigilance on yields, fiscal policy and FX as yen weakness persistsBoJ preview: no changes expected amid lack of inflation progress and geopolitical risk This article was written by Eamonn Sheridan at investinglive.com.