Chiyoda Life was Japan's fourth-largest insurer — until its bubble-era promises came due

Chiyoda Mutual Life sold the policies Japan's bubble economy demanded: long-term savings with generous guaranteed benefits, written in the late 1980s when the returns to pay for them seemed permanent. When the property and stock markets collapsed, the assets backing those promises collapsed with them — non-performing loans, worthless holdings, falling premiums — while the obligations stayed exactly as signed.

Japan's Financial Reconstruction Commission spent months trying to arrange a rescue, pressing domestic banks and courting foreign ones; Chiyoda itself held talks with AIG and Allianz. No deal closed. On 9 October 2000 the company filed for bankruptcy protection with ¥2.94 trillion ($26.95 billion) in liabilities — the largest failure of a Japanese life insurer to that date, and the fourth mid-sized insurer to go under that year.

Eleven days later, Kyoei Life followed it into bankruptcy with ¥4.53 trillion in debts, and October 2000 became the most costly month of corporate failures in Japan's postwar history. The two cases are taught together because the mechanism was identical: guarantees priced for one economy, serviced in another, and capitalised for neither. The regulator's attempt to arrange a rescue changed the timing; it could not change the arithmetic.