Japanese economic boom-bust phenomenon

Princes of Yen (also a good book) lays out that the Americans put all the zaibatsu back in charge of the economy post-war, and they did a pretty good job. Then, predatory western capital wanted a piece of pie, but the only way to get in was to purposefully cause a bubble to break the whole system. The simplified version is that the zaibatsus focused all new money investment into capital expansion, and the bubble was caused by economic sabatuers pivoting the banks towards dumping newly created money into speculation.