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Japan FX chief Mimura says on alert over yen moves, not reassured

By Thomson Reuters Sep 3, 2026 | 4:56 AM

TOKYO, Sept 3 (Reuters) – Japan’s top currency diplomat Atsushi Mimura said on Thursday that he remained on ​alert over currency market developments, ‌warning that he was not yet comfortable with recent moves in the yen.

The yen extended gains after a sudden burst ‌higher ​on Wednesday, though traders ⁠pointed to rising ⁠bets on Bank of Japan rate hikes rather than attribute the move to intervention by the Japanese authorities.

Mimura, ​Japan’s vice finance minister for international affairs, declined to comment on ⁠specific currency levels ⁠or market movements, but said ​he was “neither satisfied nor reassured” by recent ​developments.

“We remain on a state of ‌heightened alert,” Mimura told reporters after he returned from the G20 finance leaders’ gathering in Asheville, North Carolina.

When asked ⁠whether authorities had conducted a rate check, Mimura said: “I will not comment on that.”

Mimura ⁠also said ‌the Japanese Finance Minister ⁠and U.S. Treasury Secretary Scott ​Bessent ‌had very productive discussions, ​whether on ⁠market developments or cooperation within the G20 framework, in response to a question about Bessent’s recent comments on Japan’s monetary policy.

(Reporting by Makiko YamazakiEditing by ​Tomasz Janowski)