Japan's Bubble Peaked in 1989 and Took Decades to Work Off
At the peak, Japanese land and equity valuations reached levels that produced genuinely absurd comparisons. The unwinding shaped Japanese policy for the next thirty years.
The Peak
The Nikkei 225 reached its high at the very end of December 1989, near 38,900. It would not revisit that level for more than thirty years.
Land valuations were more extreme still. At the height, comparisons circulated suggesting the grounds of the Imperial Palace in Tokyo were worth more than substantial portions of American real estate. Whether any particular version of that comparison is precisely accurate, it captures the scale of what had happened to Japanese land prices.
How It Inflated
Several forces combined. Japanese growth through the postwar decades had been genuinely extraordinary, which supported a widely held belief that the economy operated on superior principles. Monetary policy was loose, partly in response to international agreements addressing the yen exchange rate.
The banking structure amplified it. Japanese banks lent heavily against land as collateral. Rising land prices increased collateral values, which supported more lending, which bid land prices higher. The feedback loop is the same one that appears in every property boom, operating here with unusual force because of the centrality of land to bank balance sheets.
When banks lend against land and land is worth more because banks are lending, the collateral and the credit are inflating each other.
The Balance Sheet Recession
The concept most associated with the aftermath is the balance sheet recession, developed by the economist Richard Koo.
The argument is that after an asset price collapse, companies find themselves holding debt incurred against assets now worth far less. They remain operationally profitable but are effectively insolvent on a mark to market basis.
Their rational response is to direct all available cash flow toward paying down debt rather than investing or expanding. That is correct for each firm individually and devastating collectively, because when the entire corporate sector repays debt simultaneously, aggregate demand collapses.
Crucially, monetary policy loses traction in this environment. Cutting rates to zero does not stimulate borrowing when the problem is that nobody wants to borrow at any rate. This is why Japan's extensive monetary easing produced disappointing results for years.
The Zombie Problem
The second structural issue was that banks avoided recognizing losses. Rather than writing off bad loans and forcing borrowers into restructuring, banks extended credit to keep struggling firms alive.
These zombie companies continued operating without genuine viability. That kept unemployment lower than it would otherwise have been, and it also occupied market share, suppressed prices, and prevented capital from moving to productive uses. Recognizing losses is painful and delaying recognition proved more expensive.
What It Taught Everyone Else
Japan's experience directly informed the response to 2008. The emphasis on rapid bank recapitalization, stress testing, and forcing loss recognition reflected a determination to avoid a prolonged zombie period.
It also introduced deflation as a genuine policy concern for modern economies rather than a historical curiosity, which shaped central bank thinking for the following two decades.
The Bottom Line
Japan's bubble was inflated by a loop between land collateral and bank credit, and the aftermath showed that when everyone repays debt at once, rate cuts stop working. Delaying loss recognition extended the problem rather than softening it.