UK House Prices -The next bubble waiting to burst ??

Despite the differences, Professor Noguchi said he also saw parallels between Japan then and America now. Last year, as a visiting professor at Stanford, he said he read real estate articles in local newspapers that sounded eerily familiar. Houses were routinely selling for $10 million or more, he said, with buyers saying they felt that they had no choice but to buy now, before prices rose even further.

"It was déjà vu," Professor Noguchi said. "People were in a rush to buy, and at extraordinary prices. I saw this same haste psychology in Japan" in the 1980's. "The classic definition of a bubble," he added, "is people buying on false expectations about future prices, and buying with the hope of selling in the future."

Economists and real estate experts see other parallels as well. In the 1980's, the expectation of rising real estate prices made many Japanese homebuyers feel comfortable about taking on huge debt. And they did so by using exotic loans that required little money upfront and that promised low monthly payments, at least for a short time.

A similar pattern is found today in the United States, where the methods include interest-only mortgages, which allow homebuyers to repay no principal for a few years. Japan had its own versions of these loans, including the so-called three-generation loan, a 90- or even 100-year mortgage that permitted buyers to spread payments out over their lifetimes and those of their children and grandchildren.

But when property prices dropped in Japan, homeowners found themselves saddled with loans far larger than the value of their real estate. Many fell into bankruptcy, especially those who lost their jobs or took pay cuts as declining property prices helped to incite a broader recession. From 1994 to 2003, the number of personal bankruptcies rose sixfold, to a record high of 242,357, according to the Japanese Supreme Court, which tracks such data.