The Japanese yen weakened past ¥162.5 per dollar on Wednesday, its lowest level in roughly 40 years, as traders bet the Bank of Japan and Ministry of Finance will keep tolerating the slide rather than risk a costly, one-sided intervention. USD/JPY traded around 162.69, up 0.07% on the day, extending Tuesday's slide to ¥162.83, also a 40-year low, according to LSEG data.
The currency's collapse has revived memories of Japan's spring intervention campaign, when the government spent roughly $74 billion, or 11.7 trillion yen, in foreign reserves defending the currency between April and May. That effort briefly worked — the yen jumped from 160.39 to 156.6 on suspected intervention on April 30 — before resuming its slide toward fresh lows.
What happened
ING currency strategist Francesco Pesole flagged ¥162 as the new line in the sand the market is watching, with the ¥162-163 range seen as the likely trigger zone for official action. He noted that thinner holiday liquidity around the July 4 U.S. holiday, combined with a strong U.S. jobs report due July 3, could be the catalyst that prompts the Bank of Japan to "pull the trigger."
Japanese officials signaled they are on standby. Finance Minister Satsuki Katayama said the government was ready to take "appropriate action" against excessive currency moves, including "decisive action as confirmed between Japan and the U.S." Chief Cabinet Secretary Minoru Kihara echoed that Tokyo would intervene if necessary.
Why it matters
The yen's slide traces back to the widening gap between U.S. and Japanese interest rates. The Bank of Japan's move to lift its policy rate to 1% marked a genuine step away from ultra-loose monetary policy, but the differential with U.S. rates remains wide — especially with new Fed Chair Kevin Warsh signaling a possible additional hike. As one strategist described the dynamic, as long as investors can borrow cheaply in yen and earn more in dollars, the carry trade will keep carrying the yen away.
Market impact
Not every desk expects a repeat of the spring intervention. Citigroup has taken a more cautious view than ING, suggesting Tokyo may hold off unless the yen weakens meaningfully further, with any future action likely aimed at nudging USD/JPY back toward the ¥155-157 range rather than reversing the broader trend. A weaker yen complicates the inflation picture for Japanese households even as it boosts exporters' overseas earnings, keeping the Bank of Japan under pressure from both directions.