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Japan's top currency diplomat flags alert over yen gains

Japan's Vice-Minister of Finance warns of heightened vigilance as the yen extends gains, citing unease over recent market moves and interest rate speculation.

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Sophie Laurent · FX & Rates Desk · 4 Sept 2026 · 01:05 · 1 min read
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Japan's top currency diplomat flags alert over yen gains

Japan's Vice-Minister of Finance for International Affairs, Atsushi Mimura, said on Thursday the government remains on high alert following a sharp appreciation in the yen, which extended gains into the new session.

Speaking in Tokyo after returning from the G20 finance ministers meeting in Asheville, U.S., Mimura told reporters the recent market movements had left him neither satisfied nor at ease. The yen has surged this week, with market participants attributing the gains to rising expectations of a Bank of Japan interest rate hike rather than any official currency intervention.

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Mimura declined to comment on whether authorities had adjusted rates or intervene in the currency market, stating only, "I will not comment on that." He also refrained from addressing specific levels or the drivers behind the yen's advance.

The remarks follow productive bilateral discussions between Japan's Finance Minister and U.S. Treasury Secretary Scott Bessent, who covered recent market developments and G20 cooperation. Bessent had previously commented on Japan's monetary policy, prompting further scrutiny of the yen's trajectory.

The yen's sudden gains on Wednesday marked one of its most pronounced moves in recent sessions, prompting heightened attention from policymakers and investors alike.

This article was produced with AI assistance and edited by a Finance Review Daily journalist.
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Written by
Sophie Laurent
FX & Rates Desk

Sophie covers currency markets and central bank policy across Europe, with a focus on how rate decisions ripple through FX pairs. She has been tracking the ECB's policy path since the start of the current easing cycle.

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