Japan's inflation is heating up. Another BOJ rake hike is becoming harder to ignore

• Producer inflation accelerated to 7.1% YoY in June, driven by elevated energy prices and AI-related demand for industrial inputs.
  
  
• Yen depreciation is amplifying imported inflation. In June, roughly 12 percentage points of inflation was caused by currency depreciation alone.
  
  
• Core inflation ticked up to 1.6% YoY, indicating that higher producer costs are gradually filtering through the economy, with upside risks remaining as energy subsidies expire and geopolitical tensions keep oil prices elevated.
  
  
• The probability of a second BOJ rate hike has increased, as inflation remains resilient, economic growth holds up and a potentially widening US-Japan interest rate differentials continue to weigh on the yen.
  
  
• A more hawkish BOJ would reshape sector leadership within Japanese equities. A stronger yen could reduce the earnings tailwind enjoyed by exporters, while easing cost pressures for import-dependent sectors. Financials are also well positioned to benefit.
  
  
• We remain constructive on Japanese equities, particularly small- and mid-cap companies, which are better positioned to benefit from Japan's domestic economic recovery while being less dependent on the earnings tailwind from a weak yen.

Just a month after raising interest rates to 1.0% — the highest level in decades — the Bank of Japan (BOJ) may already be facing pressure to tighten again soon. While policymakers have signalled a gradual path towards policy normalisation, a combination of accelerating inflation and a rapidly weakening yen is making the case for a second rate hike in 2H2026 increasingly compelling.

Producer price accelerated sharply in June

Japan's Producer Price Index (PPI) rose 7.1% year-on-year in June, according to the BOJ's preliminary estimates. This marks the fourth consecutive month of accelerating producer inflation, rising from 2.9% year-on-year in March to 5.4% in April, 6.6% in May and 7.1% in June.

The acceleration in producer prices was primarily driven by two baskets of commodities: those exposed to higher crude oil prices and those linked to the semiconductor value chain.

Petroleum and coal product prices surged 22.8% year-on-year, while higher crude oil and naphtha prices pushed chemical prices up 14.4%, reflecting the pass-through of elevated energy costs across the manufacturing sector.

At the same time, persistent AI investment continued to support demand across the semiconductor supply chain. Prices for information and communications equipment rose 14.5%, while non-ferrous metals—key materials used in semiconductors, power grids and AI infrastructure—jumped 39.2%, underscoring robust demand for critical industrial inputs.

Together, elevated energy prices and robust AI-related demand indicate that Japan's producer inflation is unlikely to ease meaningfully in the near term.

Weak yen amplifies inflationary pressures

These global price pressures are being amplified by a rapidly weakening yen. The Japanese currency has fallen to around JPY163.8 per US dollar on 24 July 2026, its weakest level in roughly four decades, as markets increasingly price in the possibility of further US Federal Reserve tightening while the BOJ remains cautious about raising rates in the second half of 2026. The potentially widening interest-rate differential continues to encourage capital outflows and weigh on the yen.

The latest import price data illustrates how significant the currency effect has become. In June, Japan's import prices increased 29.7% year-on-year in yen terms, compared with 17.8% in contract-currency terms. The roughly 12-percentage-point difference reflects the direct impact of yen depreciation.

Importantly, June's PPI calculations were based on an average exchange rate of JPY160.8 per US dollar, stronger than current spot levels above JPY163. If the yen remains around current levels, July's producer inflation data could show an even larger currency-driven contribution.

In short, the yen has become an inflation amplifier, intensifying imported cost pressures and placing an even greater burden on Japan's economy.

Figure 1: A weak yen has amplified the import costs

Producer inflation is beginning to feed into consumer prices

Producer prices typically lead consumer inflation, and June's CPI data suggests that this pass-through has already begun. Headline CPI accelerated to 1.7% year-on-year from 1.5% in May, while core CPI, excluding fresh food, rose to 1.6%, marking its first acceleration since March.

Energy price movement also illustrates how underlying price pressures are beginning to overwhelm government support measures. Energy prices fell just 0.1% year-on-year in June after declining 2.5% in May, indicating that subsidies are becoming less effective in offsetting rising import costs.

Looking ahead, inflation risks could intensify further. The government's JPY3.11 trillion energy support package is scheduled to expire in October, while renewed geopolitical tensions in the Middle East have pushed Brent crude back towards USD100 per barrel. The fragile ceasefire between the US, Israel and Iran underscores the risk that energy prices remain elevated through the second half of the year. Taken together, these factors suggest that consumer inflation is likely to remain as a key headwind for Japan’s economy over coming months.

Figure 2: Inflation has been picking up for consecutive months

The case for another BOJ hike is strengthening

Since March, we have argued that another BOJ rate hike in 2026 would depend primarily on two conditions - inflation remaining persistently above the 2% target; and economic growth holding up despite tighter financial conditions.

Table 1: Potential triggers for a second BOJ rate hike in 2026

Scenario	Growth	Inflation	BoJ Response
Gradual normalisation	Moderate slowdown	Near 2% target	Continue gradual, data-dependent normalisation
Second hike later in 2026	Limited damage	Persistently above 2% target	One additional hike becomes more likely
Faster tightening	-	Inflation materially overshoots target	BOJ may accelerate tightening
Pause	Sharp deterioration	-	Pause further tightening to assess growth risks
Source: iFAST estimates.

Recent data increasingly supports both conditions.

The pickup in headline and core CPI suggests that higher producer costs are beginning to filter through to consumers despite government energy subsidies. Should these subsidies expire as scheduled in October, consumer inflation could accelerate further as households bear a greater share of rising energy costs.

Meanwhile, Japan's economy remained resilient. Retail sales accelerated to 5.3% year-on-year in May, up from a revised 2.8% in April, supported by positive real wage growth. On the external front, exports surged 19.3% year-on-year, marking a fourth consecutive month of double-digit growth. The gains were supported by the weaker yen as well as robust global demand for AI-related semiconductors and data centre equipment. Overall, these figures should give the Bank of Japan greater confidence to continue its gradual policy normalisation, making another interest rate hike later this year increasingly likely.

Another consideration is the yen weakness. Japan has already spent an estimated USD73-74 billion intervening in the foreign exchange market after the yen breached JPY160 earlier this year. However, these interventions have only slowed the pace of depreciation rather than reversing it.

The underlying driver remains the substantial 275 basis points of policy rate differential between the US and Japan. Should the Federal Reserve signal a stronger inclination to tighten monetary policy further in the upcoming meeting on 28-29 July, markets are likely to price in an even wider policy rate divergence, putting additional depreciation pressure on the yen.

While the BOJ does not target the exchange rate directly, sustained yen weakness risks importing further inflation into the economy. That raises the likelihood that policymakers may need to accelerate policy normalisation if inflation continues to surprise on the upside.

Remain constructive on Japan with a preference toward SMIDs

We do not expect the BOJ to raise rates at its upcoming meeting on 31 July. However, the accompanying statement and Governor Ueda's guidance will be closely watched for any indication that policymakers are becoming more concerned about imported inflation and currency weakness. A more hawkish tone would likely support the yen, particularly beneficial for investors with unhedged Japanese equity exposure.

For Japanese equities, sector performance is likely to become increasingly differentiated. Exporters have been among the primary beneficiaries of yen weakness, enjoying favourable earnings translation and enhanced overseas competitiveness. However, those advantages could gradually fade if investors begin pricing in faster BOJ tightening and a stronger yen. However, we believe the impact will be less significant for companies across the semiconductor value chain, as strong structural demand continues to be the key driver of their earnings performance. In contrast, import-dependent sectors such as utilities, transportation and food producers stand to benefit as a firmer currency partially offsets elevated inflation by reducing the cost of imported energy and raw materials. Financials remain well positioned in this environment, as higher interest rates and a steeper yield curve are typically supportive of net interest margins and profitability.

This backdrop also strengthens the investment case for Japanese small- and mid-cap equities. Compared with Japan's large-cap exporters, SMID companies derive a greater share of their revenues domestically and are therefore less reliant on a weak yen for earnings growth. Many also stand to benefit from continuous wage growth, higher business investment and ongoing corporate governance reforms. As the BOJ continues to normalise monetary policy, leadership in the Japanese equity market could broaden beyond globally exposed exporters, creating a more favourable environment for domestically oriented SMID companies.

Table 2: Recommended products

Japan	·                    Eastspring Investments - Japan Dynamic AS SGD ·                    Amova Japan Equity SGD (formerly Nikko AM)
Japan Small Cap	·                    Janus Henderson Horizon Japanese Smaller Companies A2 USD ·                    BNP Paribas Japan Small Cap Classic Cap SGD

Declaration:

For specific disclosure, at the time of publication of this report, IFPL (via its connected and associated entities) and the analyst who produced this report hold a NIL position in the abovementioned securities.

This research report was prepared with the assistance of artificial intelligence (AI) tools. iFAST Financial Pte Ltd does not rely exclusively on AI for content generation; the content of this report – including all investment theses, ratings, price targets and conclusions – has been independently reviewed and verified by the research analyst(s) to ensure accuracy and professional integrity.