Japan Yen Intervention: Can $53 Billion Reverse the USD/JPY Decline?

Japan’s suspected $53 billion yen-buying operation has put USD/JPY under pressure, as Tokyo stepped into the market to slow a slide toward four-decade lows.

Japan Likely Spends Record Amount to Support Yen

Japan likely spent about ¥8.45 trillion, or $52.8 billion, buying yen and selling dollars on Thursday. The estimate is based on central bank account movements and money broker forecasts.

The operation would likely mark Tokyo’s largest single-day currency intervention. The move came after the yen weakened below 163 per dollar earlier this month, raising concerns over import costs.

Japan reportedly acted during New York trading, marking its first yen-buying operation in three months. The yen jumped as much as 3%, pulling USD/JPY from near 164 to below 158.

The rally later faded after the Bank of Japan kept interest rates unchanged at 1%. USD/JPY rebounded above 160 before settling closer to 159.

Finance Minister Satsuki Katayama declined to confirm whether authorities intervened. She said Japan was “always ready to respond with a sense of urgency” to exchange-rate moves.

U.S. Support Draws Market Attention

Japan’s top currency official Atsushi Mimura also declined to confirm the operation. However, he said Japan was receiving support from the United States that “goes beyond psychological support.”

Mimura said that support “would include” rate checks when asked whether U.S. authorities were involved. Rate checks often happen when central banks ask dealers for currency quotes before possible market action.

U.S. Treasury Secretary Scott Bessent also said Japan may have acted to support the yen. He reportedly added that the yen “seems very undervalued to me.”

The comments increased market focus on whether Washington backed the operation. No official statement confirmed that U.S. authorities sold dollars directly.

South Korea also sold dollars on Thursday to support the won. The won rose about 2% to a nine-month high before giving back part of the move.

The same-day action by Japan and South Korea came as weaker Asian currencies raised pressure from imported energy costs. Higher oil prices tied to Middle East tensions have added to those concerns.

BOJ Rate Path Remains Key for USD/JPY

The Bank of Japan held its policy rate at 1% after the suspected intervention. One board member supported a hike to 1.25%, but the majority voted to keep rates steady.

Markets are now watching Governor Kazuo Ueda’s guidance on future rate hikes. A faster rate path could support the yen, while a cautious approach may allow renewed pressure on the currency.

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Japan spent ¥11.7 trillion, or about $73 billion, between late April and early May to support the yen. That intervention produced only a temporary recovery before the currency fell to new lows.

The latest operation faces the same test since a large yen purchase can slow sharp moves, but lasting strength may depend on interest rates, inflation, oil prices, and dollar direction.

Asian stocks rose as currency pressure eased and technology shares rallied. Japan’s Nikkei gained about 5%, while South Korea’s KOSPI and Taiwan’s Taiex also advanced.

A stronger yen can also affect global risk assets since traders often borrow in yen to fund positions in stocks and crypto, so sudden yen gains can force position cuts.

With Japan’s intervention giving the yen temporary support, USD/JPY has remained above 159 after the BOJ kept rates unchanged. Traders now await further signals from Japanese officials and Governor Kazuo Ueda on whether currency action will be matched by a faster rate-hike path.