Japan Shakes Off Deflation as Capex Revival, Corporate Reforms, and a Cheap Yen Power Long-Term Asset Returns

Japan is decisively closing the chapter on decades of structural deflation, positioning its economy and capital markets for higher nominal expansion, rising bond yields, and attractive equity returns over the next 10 to 15 years, according to J.P. Morgan Asset Management’s "2027 Long-Term Capital Market Assumptions" (LTCMA).

Driven by rising corporate investment, intensifying governance pressure on undervalued companies, and the imperative to automate a shrinking workforce, Japan is emerging as a primary beneficiary of global capital rewiring and a standout diversifier for institutional portfolios.

1. Macroeconomic Outlook: Modest Growth Driven by AI and Capex

• Real GDP Upgrade: Japan’s long-term real GDP growth forecast has been revised upward by 10 basis points to an annualized 1.0% (up from 0.9% in the 2026 edition).
• Productivity vs. Demographics: The growth upgrade is driven entirely by artificial intelligence adoption and automation, split evenly between gains in total factor productivity (TFP) (+5 bps) and capital deepening (+5 bps). Japan’s trend total TFP is projected at 0.7%, comprising a 0.4% non-AI baseline and a 0.3% AI dividend.
• Workforce Dynamics: Severe demographic contraction remains a persistent headwind. While increased labor force participation among female and older workers helps cushion the decline, it softens rather than cures Japan’s demographic deficit.
• Capital Spending & Returns: Corporate capital expenditure in Japan is currently expanding at 1.6% year-over-year, outpacing Europe (1.4%) though trailing the U.S. capex boom (6.1%). Over the past decade, Japanese corporate Return on Invested Capital (RoIC) has averaged in the low teens, compared to approximately 17% in the U.S..
• Long-Term Infrastructure Needs: Japan, alongside the U.S. and Europe, faces an estimated USD 31 trillion in cumulative infrastructure modernization needs through 2040, centered on electrical grids, logistics networks, and transportation hubs.

2. Inflation and Monetary Regime: The Deflationary Era Ends

• Long-Term Inflation Boost: Long-term Japanese consumer price inflation is projected to average 1.9% per year, an upward revision of 20 basis points from the previous 1.7% forecast.
• Structural Break: Sustained domestic capital spending and fiscal initiatives have "decisively ended the era of exceptionally low inflation in Europe and Japan," permanently extricating the economy from chronic stagnation.
• Underlying Price Pressures: Japan's projected inflation path sits just below the Bank of Japan’s 2.0% target. While long-term inflation expectations and labor market dynamics exert downward pressure, upward forces from fiscal policy, green energy transition spending, and global trade frictions keep trend inflation firmly positive.

3. Fixed Income: Higher Starting Yields Rebuild JGB Return Profiles

Japanese fixed income return expectations reflect normalized yields and steeper yield curves:

• 10-Year Japanese Government Bonds (JGBs): Expected to deliver an annualized return of 3.3% in local currency terms, anchored by a cycle-neutral equilibrium yield of 2.7%.
• 30-Year JGBs: Projected to return 4.9% annualized, with a cycle-neutral yield of 3.1%.
• Cash Rates: Japanese cash yields are pegged at a cycle-neutral 1.9%, with an expected compound return of 1.8%.
• Investment Grade Corporate Credit: JPY-denominated corporate credit is forecast to yield an annualized return of 3.1%, based on a cycle-neutral yield of 3.2% and an equilibrium credit spread of 75 basis points.

4. Currency: Severe Yen Undervaluation Sets Up Long-Term Rebound

• Valuation Disconnect: The Japanese yen trades at an extreme discount to fair value, ranking among the most heavily undervalued currencies in the developed world at roughly 35% below purchasing-power-parity levels.
• Driver of Dollar Weakness: Over the 10- to 15-year forecast horizon, ongoing trade-weighted depreciation of the U.S. dollar is expected to be led primarily by Asian currency pairs—specifically the Japanese yen, South Korean won, and Chinese yuan.
• Spot and Terminal Targets:
  • Starting Spot Rate: 157.40 USD/JPY.
  • 10- to 15-Year Terminal Forecast: 117.02 USD/JPY (a 1.1% adjustment from 118.34 in the 2026 assumptions), implying substantial long-term yen appreciation against the greenback.

5. Equities: Corporate Reform and Attractive Valuations Fuel 9.1% USD Returns

• Expected Return Upgrades:
  • USD-Denominated Returns: Japanese equities are projected to generate a 9.10% compound annual return (10.37% arithmetic return) with 16.89% annualized volatility, up 30 basis points from 8.80% in the 2026 report.
  • EUR-Denominated Returns: 8.60% unhedged (9.65% arithmetic, 15.32% volatility) and 7.60% currency-hedged (9.07% arithmetic, 18.09% volatility).
  • GBP-Denominated Returns: 8.80% unhedged (9.73% arithmetic, 14.40% volatility) and 7.80% currency-hedged (9.28% arithmetic, 18.19% volatility).
• Corporate Governance Transformation: Capital rewiring across East Asia is directly altering corporate balance sheets. In Japan, persistent regulatory and exchange pressure on companies trading below book value ($P/B < 1.0$) is actively forcing management teams to unlock shareholder value, streamline unwieldy capital bases, and divest unprofitable business segments.
• Broader Capex Foundation: Unlike cyclical Asian peers heavily concentrated in pure-play semiconductor fabrication, Japan’s domestic capex recovery is spread broadly across multiple industries, providing more resilient aggregate corporate profit margins.

6. AI Adoption and Structural Bottlenecks

• High Incentive vs. Cultural Inertia: Japan possesses arguably the strongest structural imperative to embrace artificial intelligence and automation in order to offset demographic contraction.
• Diffusion Obstacles: While Japan ranks comfortably high on task exposure (approximately 73%–74% of work tasks exposed to AI) and readiness (an IMF AI Preparedness Index score of approximately 73), long-tenure corporate employment norms could slow actual workplace diffusion compared to more flexible labor markets.

7. Portfolio Allocation: Japanese Equities Earn an Overweight Stance

• Mean-Variance Optimization: In stylized multi-asset portfolio optimizations based on 2027 LTCMA estimates, Japanese equities are explicitly selected for an overweight allocation alongside long-duration fixed income, private core real estate, transportation, and hedge funds, while European and emerging market equities are underweighted.
• Idiosyncratic Diversification: Because Japanese equities are tied to domestic corporate balance sheet restructuring and local investment rather than solely reflecting global mega-cap tech mania, they exhibit lower susceptibility to AI capex digestion shocks and serve as an effective diversifier in global portfolios.

IMF Regional Economic Outlook for Asia and Pacific

The IMF's October 2026 Regional Economic Outlook for Asia and the Pacific arrives at a critical juncture for the global economy. As global activity navigates severe, compounding external shocks—including acute geopolitical escalation in the Middle East, persistent US tariff barriers, tightening monetary stances across major monetary authorities, and

Japan FinTech ObserverNorbert Gehrke