Japan's four largest life insurers were sitting on a combined $96 billion, or about ¥15.13 trillion, in unrealized losses on domestic bonds at the end of June 2026, a record total that rose 7% in the April-June quarter. Nippon Life Insurance, Dai-ichi Life Insurance, Sumitomo Life Insurance and Meiji Yasuda Life Insurance all posted larger mark-to-market losses as the Bank of Japan's shift away from negative interest rates in March 2024 pushed Japanese government bond yields higher. While life insurers typically hold bonds to maturity and can avoid realizing losses if they do not sell, the growing gap underscores duration risk and the vulnerability that could emerge if policyholder withdrawals forced bond sales. Japan's Financial Services Agency has accelerated reviews of insurers' balance sheets, with attention on liquidity and solvency risks, as regulators and markets watch whether further BOJ tightening drives yields and paper losses still higher.