Yen slide lifts Japan stocks as Wall Street tech rebounds

A yen slide to a four-decade low is set to buoy Japanese shares at the open as Wall Street’s tech rebound steadies global risk appetite.

Equity index futures signaled a stronger start for Tokyo trading, while indications for Hong Kong and Sydney suggested a more muted session. In the US, S&P 500 futures were little changed after the cash index advanced 1.2% on Monday.

The move in US equities was helped by a bounce in several large technology names and a recovery in chipmakers. That group had just posted its steepest weekly decline since April 2025, before staging a rebound that supported broader sentiment.

Yen weakness boosts exporters but raises political pressure

The yen’s drop has been a tailwind for Japan’s export-heavy companies by inflating the value of overseas earnings when translated back into yen. That dynamic has been one factor behind Japanese equities pushing to record levels in recent months.

At the same time, the weaker currency increases the cost of imports, from energy to food inputs, adding strain for households. The squeeze on living costs has also intensified scrutiny of Prime Minister Sanae Takaichi’s government, which faces pressure as voters feel the impact of higher prices.

Market participants also see the latest milestone in the currency as raising the probability of official action. A rapid depreciation can trigger “intervention watch,” as traders look for signals that authorities may try to slow or reverse the move.

“Intervention is right around the corner if we don’t see a quick correction,” said Andrew Hazlett, a foreign-exchange trader at Monex Inc. He added that such steps may not change the broader trend unless the gap in interest rates between Japan and the US narrows.

BOJ rate hike contrasts with expectations for a hawkish Fed

Japan’s central bank has already taken steps to normalize policy, lifting its benchmark rate on June 16 to 1%. The increase took the policy rate to its highest level since 1995, underscoring a shift away from years of ultra-low settings.

Even so, the currency reaction has been limited, reflecting investors’ focus on US monetary policy. Traders continue to position for the Federal Reserve to remain relatively hawkish, a stance that can keep US yields elevated and preserve the yield advantage that supports the dollar against the yen.

The tension between domestic rate moves and global yield differentials leaves Japanese policymakers in a difficult spot. Further tightening could support the currency but risks weighing on growth, while tolerance for a weaker yen brings relief to exporters yet amplifies the inflation burden at home.

Oil holds gains as Strait of Hormuz traffic slows

In commodities, oil prices held onto gains as shipping activity slowed through the Strait of Hormuz, a key transit route for global crude flows. Any disruption—or even the perception of heightened risk—can feed into energy pricing and, for Japan, intensify the import-cost impact of a weaker currency.

For investors, the near-term focus is likely to remain split between currency volatility and the durability of the US-led tech bounce. In Japan, the yen’s trajectory and any hint of official action will be central, alongside how corporate outlooks reflect both export benefits and rising input costs.

Next steps to watch include whether the yen’s decline accelerates or stabilizes, and whether US rate expectations shift enough to alter the interest-rate gap driving currency moves. Equity markets in Tokyo, meanwhile, are poised to open with exporters in the spotlight as traders weigh policy risk against earnings support.