Bank of Japan headquarters, August 16, 2026. File photo. Syced / Wikimedia Commons · CC0. Display crop.
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By E.K.K
The Bank of Japan drew attention to the financing behind AI construction in its October 23 financial system report. Technology companies are expanding facilities, investment funds supply capital, and Japanese banks may lend to those funds. A data centre built overseas can therefore have consequences for lenders in Japan.
The question is who bears the loss if the income from those facilities fails to catch up with the cost of building them.
Behind a data centre, a chain of borrowing
Large technology companies do not have to build every facility with their own money. They can use cash, issue corporate bonds or sign long leases for capacity owned by other companies. Funds can invest in those facilities and earn returns from their construction and rental income.
The BOJ points to the growing role of overseas funds and other non-bank financial institutions in financing AI investment. These are businesses that invest or provide financing without being banks. They can also borrow from banks themselves.
A bank may list a fund as its customer, but that customer's ability to repay can depend on data centre rents and technology spending. Several apparently different borrowers may be exposed to the same investment cycle. If their projects run into trouble together, a lender's portfolio may be less diversified than it looks.
A lease does not settle the question of returns
A data centre must cover equipment, electricity and financing costs. Investors expect revenue from the computing capacity it provides to support those expenses.
If demand falls short of expectations, the first change may be a lower valuation. A facility that still has customers and earns enough rent to pay interest need not default. The more difficult situation is persistently weak income combined with an inability to obtain new financing when existing debt falls due.
A fund might then sell other investments to raise cash. Banks might ask for more collateral or reduce the amount they are willing to lend. Through those decisions, trouble with a particular construction project could affect other asset prices and borrowers. This is a possible sequence to guard against, not a chain of defaults established by the report.
Asian suppliers will watch the next order
For Asian manufacturers, a slowdown could first appear in customers' purchasing decisions. A smaller or delayed data centre project could mean postponed orders, changed delivery schedules or renewed negotiations over prices.
The impact would differ between suppliers. A business that relies heavily on a few large customers has different vulnerabilities from one with a broader customer base and product range. An AI connection alone says little about its ability to absorb a setback.
Banks' responses also matter. Losses on related loans could lead lenders to review terms for similar borrowers. A wider deterioration could eventually affect financing for other businesses. The report does not establish that a broad credit squeeze is already taking place across Asia.
The BOJ's overall assessment remains that the financial system is stable and that banks have capital and funding foundations to withstand stress. That conclusion belongs alongside its warning about emerging risks.
Construction budgets, income from new facilities and banks' recognition of loan losses will provide more useful evidence than a single day's share-price movement. If earnings catch up with investment, borrowing can remain manageable. If construction keeps expanding while income lags, the lenders backing it will have to revisit their calculations.
Sources
Bank of Japan: Financial System Report, October 2026
Reuters: BOJ warning on AI financing