Japanese banks withstand combined AI, oil and interest rate stress

Banks retain sufficient capital and stable funding to withstand global financial crisis-scale stress and simultaneous oil price increases, weaker AI investment expectations and higher interest rates.

Lending remains active, with no major domestic financial imbalances.

Foreign non-bank financial intermediaries increasingly finance AI investment through private funds, while hyperscalers expand bond issuance and long-term data center leases.

The BoJ tests how fund portfolio adjustments amplify AI-related losses and transmit them to Japan.

Banks' foreign fund and data center loans remain limited but require portfolio controls.

A hypothetical 100 percent oil price increase raises default risk for a limited share of SMEs overall, with larger effects on some cost-sensitive firms.

Stocks exceed their trend, but end-September price-earnings ratios remain near their average since 2008.

Equity yield spreads over 10-year Japanese government bonds have narrowed.

Property prices are accelerating in the three major metropolitan areas, especially Tokyo, where commercial property risk premiums are declining.

Firms' interest rate resilience has improved overall, but weaker SMEs face profit pressure.

Wage gains cushion mortgage costs; growing use of loans exceeding 35 years requires closer borrower explanations and risk management.