Japan's Financial Services Agency has begun an inspection of shinkin banks and credit cooperatives over swelling unrealised losses on their Japanese government bond holdings, according to a Kyodo News report published on Thursday. Working with the regional finance bureaus, the agency expects to cover roughly 400 regional financial institutions, starting the reviews in sequence and aiming to complete them by March next year. Institutions holding the largest volumes of government bonds will be examined first. Supervisors intend to question managements on the reasons behind increases or decreases in their bond holdings, and where losses are being booked, to confirm how those losses will be processed.
The move follows a sharp repricing in Japan's government bond market. The benchmark 10-year yield touched 3.000% this week, a level not seen in about 30 years, extending a sell-off that has eroded the market value of the long-dated government and municipal bonds accumulated by regional lenders during the country's prolonged ultra-low interest rate era. Because bond prices fall as yields rise, the agency concluded that the deterioration carried the risk of destabilising the management of smaller cooperative-type lenders. The FSA has authority to issue administrative orders where financial conditions deteriorate beyond a certain point, but the current exercise is designed to precede that step and to prompt institutions to adopt voluntary remedial measures.
HOW PAPER LOSSES BECOME REALISED LOSSES
The distinction the FSA is probing is the one between accounting treatment and cash impact. A decline in bond prices is recorded as an unrealised, or paper, loss; an institution that continues to hold the securities to maturity does not book a loss, although the efficiency of its fund management may suffer as capital remains locked into low-yielding paper. The risk arises when an institution sells to secure liquidity, at which point the loss is crystallised and becomes a direct drag on earnings and capital. That sequence is precisely what supervisors have asked institutions to explain, including their intended treatment of any losses recognised.
Evidence of the strain has already surfaced in reported results. Seventeen shinkin banks nationwide fell into net loss for the year ended March 2026, with losses on the disposal of government and municipal bonds identified as the principal cause alongside rising credit costs. Tajima Shinkin Bank in Hyogo Prefecture posted its first loss in 13 years after booking 22 billion yen in bond disposal losses, while 27 shinkin banks across Kyushu and Okinawa recorded combined government bond sale losses of 22.7 billion yen, an increase of about 80% on the prior year. The Bank of Japan's July analysis of fiscal 2025 results found that core operating profit at shinkin banks, excluding investment trust cancellation gains, remained on an increasing trend, indicating that the pressure originates in securities portfolios rather than in lending operations.
A WIDENING SUPERVISORY PERIMETER
The shinkin inspection extends a supervisory push that has moved progressively down the tiers of Japan's banking system. The FSA had already signalled in October 2025 that it would conduct on-site checks after unrealised losses on government bonds across the shinkin sector reached just under 2.5 trillion yen, roughly triple the level of a year earlier; subsequent reporting has put the figure at around 3 trillion yen. Separately, the agency has been conducting a simultaneous review of asset-liability management practices at approximately 100 regional and second-tier regional banks, examining whether those institutions can withstand deposit competition and bond valuation losses in a rising-rate environment. Megabanks are not included in that exercise.
The inspection lands as the Bank of Japan continues to normalise policy, having raised its policy rate to 1.00% in June 2026 from 0.75%. Larger institutions have responded by accelerating disposals: Yamaguchi Financial Group booked substantial losses offloading government bonds last fiscal year and has signalled further reductions. For the shinkin sector, where hedging capability and portfolio diversification are less developed, the question supervisors will answer over the coming six months is how many of the roughly 400 institutions under review can absorb their positions through to maturity, and how many will require capital support of the kind already sought from Shinkin Central Bank.