Japan's stock market crash of 1990 and the lost decades

How did Japan’s bubble build before the 1990 stock market crash?

The Plaza Accord of September 1985 pushed the yen up sharply, from 236.91 yen per dollar in September 1985 to 202.75 in December 1985. A stronger yen hurt exporters, and credit stayed cheap in the years that followed. Cheap borrowing flowed into shares and land, and each rise in collateral value allowed more borrowing. That loop lifted both markets together.

Land prices climbed even faster. Tokyo commercial land rose about 42% in 1985 and about 122% in 1986, and the grounds of the Imperial Palace were estimated to be worth more than the entire real estate value of California. Such comparisons showed that prices had left earnings and rents behind. A price story that needs ever higher prices to hold together remains the pattern to recognize.

What happened to Japan’s stock market from the 1989 peak into 1990?

The Nikkei 225 closed at 38,915.87 on 29 December 1989, with an intraday high of 38,957.44 that day, a record that stood for 34 years. The new decade opened with a fall. The index went from 37,189 on 4 January 1990 to 23,849 on 28 December 1990, a loss of more than 35% in value, with a yearly low of 21,902 on 5 December.

The fall unfolded over a full year instead of a single session, which separates it from Black Monday 1987. Each rally attracted buyers who hoped that the old trend had returned, and each failure cost them more. A slow crash lets investors keep hoping, and hope delays the decisions that limit losses. As of October 2026 that behavior still appears in markets that fall by steps.

How did Bank of Japan rate rises end the stock market bubble?

The Bank of Japan raised its official discount rate 5 times in 15 months. It moved from 2.5% to 3.25% on 30 May 1989, to 3.75% on 11 October 1989, to 4.25% on 25 December 1989, to 5.25% on 20 March 1990, and to 6.00% on 30 August 1990, citing the Gulf Crisis. Each step raised the cost of the loans that supported share and land prices.

Sharp rate increases in late 1989 burst the bubble, and the stock market crashed. Borrowers who had bought assets with loans saw collateral values fall while interest bills rose. The sequence is a clear case of how markets that run on borrowed money react to the price of money, and it gives investors a concrete item to watch: the pace of rate changes, compared with the amount of credit in the system.

How did Japan’s stock market crash of 1990 reach banks and land?

Land prices fell more slowly than shares and then kept falling. By 1992, urban land prices in the 6 major cities stood 15.5% below their peak, and Tokyo residential land fell 19% and commercial land 13% compared with 1991. Banks held land as collateral, so each fall cut the value of the security behind their loans. The Nikkei decline had become a banking problem.

Banks were left with bad debt, and their credit growth stagnated. Bailouts, cheap central bank credit, and delayed loss recognition turned many banks into zombie banks that kept lending to weak borrowers rather than recognise the loss. Credit that flows to weak borrowers leaves less for strong ones, which slows the whole economy and extends the recovery.

What are the lost decades that followed Japan’s 1990 crash?

The lost decade first referred to the 1990s. The label later extended to the 2000s and then to the 2010s, as slow growth continued. From 1991 to 2003 GDP grew only 1.14% a year, and average real growth from 2000 to 2010 was about 1%. The crash started a period in which debt, prices, and population trends all pointed toward slow growth.

Deflation made cash more valuable as time passed, which led firms to cut wages, research, and investment. An aging population gradually reduced competitiveness and potential growth. Japan’s share of world nominal GDP fell from 17.8% to 3.6% between 1995 and 2025, though part of that fall reflects the rise of other economies. Debt stood at about 240% of GDP as of 2013, the highest of any nation at that time.

How long did the Nikkei take to recover from the 1990 stock market crash?

The Nikkei 225 reached an intraday low of 6,994.90 on 28 October 2008, which is 82% below its peak nearly 19 years earlier. Policy tried to help: the Bank of Japan introduced quantitative and qualitative easing in 2013 and a bank rate of minus 0.1% in 2016, and Shinzo Abe launched Abenomics in December 2012. The index rallied to 20,000 in May 2015.

On 22 February 2024 the index closed at 39,098.68, above its 1989 record, after 34 years. Mizuho’s Kazuo Monma argued the gain reflected corporate reform rather than economic growth. An investor who bought near the 2008 low saw the index rise more than 5 times, while an investor who bought the 1989 peak waited 34 years for the same price.

What does Japan’s 1990 stock market crash teach investors?

3 lessons stand out. First, a bubble in shares and land ends when the price of credit rises, and the end can take a year or more to play out. Second, the damage moves from markets to banks to growth, so the later stages matter more than the first fall. Third, recovery in price can take decades, so the time horizon of a portfolio decides who gets hurt.

Investors in Asia study the Japanese case because the same links between credit, collateral, and confidence exist across the region. You can test your exposure to a slow fall on the EQOS Asia simulator, which compares a soft landing, a correction, and a crash. Return to the series on the stock market crash for other episodes. This page is general information, not investment advice.

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About the author

Stéphane Jambu

President, EQOS Forecast Asia

Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile