What was the name of the 1989 Japanese stock-market peak-and-collapse era often linked to inflated land and share prices?

The 1989 Japanese stock-market peak-and-collapse era linked to inflated land and share prices was the Japanese asset price bubble.

During the late 1980s, Japanese land and stock prices rose dramatically. Easy credit, optimistic expectations, and strong investment helped push asset valuations far above levels supported by underlying economic returns. The Nikkei 225 reached its famous record near the end of 1989.

The bubble then burst as monetary policy tightened and asset prices turned downward. Banks were left with impaired loans, businesses reduced investment, and the economy entered a prolonged period of weak growth often associated with Japan’s Lost Decades.

The “Lost Decade” is not the name of the bubble itself. It describes the subsequent stagnation, while the Japanese asset price bubble refers to the boom and collapse in property and equity prices.