Japan’s record bull run under threat as Mideast war clouds earnings season

Japanese stocks have surged, with the Nikkei up 27% in 2025 and briefly breaching 60,000, but the Middle East conflict is injecting caution through higher oil prices and earnings risk. Fast Retailing raised full-year operating profit guidance to 700 billion yen from 650 billion yen, while Nomura’s Japan earnings estimate revision index fell to 13, its lowest since September. UBS SuMi Trust cut its Japanese corporate earnings growth forecast for the year through March 2027 to 7% from 11% as energy costs and inflation pressures build.

Analysis

The market is treating this as an “inflation tax” shock rather than a growth shock, which matters because equities can absorb margin pressure far better than outright demand destruction. Japan’s most vulnerable exposures are the cost-setters with weak pass-through and imported input intensity: chemicals, housing materials, transport, and lower-end consumer goods. The bigger second-order winner is not just semis from AI capex, but any exporter/industrial with pricing power and non-Japan revenue, since a weaker yen and sticky domestic inflation can make overseas earnings look relatively more resilient in local terms.

The key tell is that estimates are still being revised up in aggregate even as the dispersion widens. That usually favors factor rotation over index direction: the headline index can keep levitating while sector leadership narrows, making broad beta longs less attractive than long/short expressions. In this setup, analysts are likely underestimating the lagged effect of energy on wage negotiations and consumer discretionary margins over the next 1-2 quarters, especially if households shift from services to necessities.

The contrarian view is that the market may be overpricing a sustained oil shock while underpricing corporate pass-through and hedging. Japanese firms have improved their ability to reprice faster than in prior commodity cycles, so the earnings hit could be shallower but more prolonged, which is worse for multiple expansion than a one-time shock. If crude retraces or supply fears fade, the most crowded protection trade in Japan should unwind quickly, and high-beta cyclicals would likely re-rate first.

Key Decisions for Investors

• Go long TOPIX semis / short Japan domestic cost-counters: long SOX-linked exposure or Japanese semiconductor beneficiaries, short a basket of Japanese chemicals, housing materials, and transport names for 1-3 months; thesis is dispersion widens even if the index stays firm.
• Buy downside protection on Japan consumer/cost-sensitive equities for the next earnings season: JPY puts on domestically oriented retailers or short-dated put spreads on discretionary proxies with 2-3x payoff if input-cost guidance gets cut again.
• Fade the broad Nikkei move with a pair trade: short Nikkei futures vs long exporters with foreign revenue and pricing power; target a 4-6% relative move if oil stays elevated and leadership narrows.
• If oil spikes again, consider a tactical long JPY hedged exporter basket rather than index beta; the risk/reward is better because yen weakness and overseas earnings can offset domestic margin compression.