The Japanese hypergrowth of the 1970s and '80s was built on a system of buddy-buddy relationships between various corporations and the government. At the time, this system appeared to be a triumph of modern corporations and state-directed capitalism, [[ValuesDissonance but nowadays, we just call it "crony capitalism"]]. Predictably, this created an unsustainable economy [[DoesThisRemindYouOfAnything based on *ahem* loose credit, a housing bubble, selling below profit, and toxic loans]]. Property values became massively overinflated, to the point where prime real-estate in Tokyo could sell for more than the entire [=GDP=] of smaller countries. At the height of the property bubble, office space in Tokyo's main business district went for ''a million dollars'' per square meter[[labelnote:∞]] (that's $92,903.13 per square foot!)[[/labelnote]]; land in the Ginza shopping district cost ¥30,000,000 per square meter[[note]] ($218,978 at about the 1988 dollar-yen exchange rate, or $20,343.74 per square foot)[[/note]]; and the value of the Imperial Palace was greater than ''all the real estate in UsefulNotes/{{California}}''.

This, and the appreciation of the yen by mid-80s started a Japanese buying spree of American properties such as Firestone Tire and Rubber Co., Columbia Pictures, and the Rockefeller Center, prompting feelings of insecurity especially in America, where Japan was often still remembered as an old foe.

But once the bubble popped, the economy stagnated, and Japan entered a "lost decade," and some say it still hasn't completely recovered almost 30 years later. Banks became zombie institutions, the central bank got stuck in a liquidity trap, and Japanese twenty-somethings faced a fate worse than death while their fathers had enjoyed lifetime employment at one company, they moved from temp job to temp job, failing to build much in the way of careers. In short, they weren't half as inhuman as the mythos.

A major factor in Japan's boom was the necessity of rebuilding all the infrastructure after UsefulNotes/WorldWarII. While a burden in the 1950s and '60s, by the '70s the Japanese economy was enjoying the benefits of much newer, more modern factories than the United States (a similar situation happened in Europe, particularly in UsefulNotes/WestGermany, but the UsefulNotes/ColdWar was more of a factor there). Also, the West put quite a bit of investment into the reconstruction of post-war Japan, particularly during the Allied occupation and the decades that followed. They also got help from [[ W. Edwards Deming,]] who had been responsible for researching major means of improving manufacturing efficiency during World War II. The American automakers, comfortable with their own profits and confident in their future, didn't want to have anything to do with him, so Deming went to Japan and taught them how to make cars that were both more reliable and cheaper than the Americans'.

Plus, as a bonus, thanks to [[ Article 9 of the Japanese Constitution]] prohibiting Japan from maintaining a military (though it [[LoopholeAbuse never mentioned anything]] about a ''[[InsistentTerminology Self-Defense]]'' [[UsefulNotes/KaijuDefenseForce Force]]) and instead relying on the United States for military muscle via the [[ Yoshida Doctrine]] and the [[ current Security Treaty]], the lucky ol' Japanese government [[ doesn't have to worry]] about spending as much on defense as it normally would with UsefulNotes/{{China}}, UsefulNotes/{{Russia}}, and UsefulNotes/NorthKorea so close by and thus could pump a lot more money into public works, education, healthcare, infrastructure, and government subsidization of business.