Japan's Asset Bubble Bursts

In the early 1990s, the surge in Japanese stock and real estate prices that had defined the late 1980s reversed into a prolonged collapse. The bursting of the bubble ended one of the great postwar economic booms and left banks, companies, and households burdened with debt for years. The period of sluggish growth and deflation that followed became known as the "Lost Decade," though many economists now extend it to two decades or more. The date of 1991 is a convenient marker, since the decline began over a span of time: stock prices peaked at the very end of 1989, while land prices fell more slowly and kept dropping into the following decade.

The roots of the bubble lay in the mid-1980s. After the Plaza Accord of 1985, the yen rose sharply against the dollar, which threatened Japan's export-driven economy. The Bank of Japan responded by cutting interest rates and keeping credit easy. Cheap borrowing, together with financial deregulation and widespread confidence in Japan's economic model, pushed money into shares and property. Banks lent heavily against land as collateral, and rising land values in turn supported more lending. At the peak, commercial property in central Tokyo commanded extraordinary prices, and the Nikkei index reached a level it would not regain for more than three decades.

Policymakers grew worried about speculation and inequality in housing wealth. The Bank of Japan raised interest rates from 1989, and authorities also introduced limits on lending to the real estate sector. Stock prices began falling in early 1990, and the downturn deepened through the following years. As land values declined, the loans backed by that land became impaired, and many borrowers could not repay.

The consequences were slow-burning rather than sudden. Banks held large volumes of bad loans, and many were reluctant to recognize losses, sometimes continuing to support failing borrowers. Companies focused on paying down debt rather than investing, and consumers grew cautious. Prices eventually began to fall, which raised the real burden of debt. Several major financial institutions failed in the late 1990s, including Hokkaido Takushoku Bank and Yamaichi Securities in 1997, and the government eventually injected public funds to stabilize the banking system. Repeated spending programs pushed public debt to very high levels, and interest rates were cut to near zero.

The legacy of the bubble remains debated. Some economists blame slow policy responses and delayed bank cleanup, while others stress demographic aging and weak demand. Japan did not collapse, however: it remained wealthy, technologically advanced, and socially stable, with low unemployment. The episode became a reference point for later crises, including the 2008 financial crisis, and a cautionary example of how asset booms, credit, and delayed repair can combine to produce long stagnation.