I've always thought that the ideological density of capitalist apologia is rather low in Japan compared to the strident tone and mind-numbing frequency with which the media broadcast the beauty of the 'free enterprise' system in America. Public support for capitalism in Japan is based on the fact that so far it has 'worked' for a lot of the Japanese, not on an ideological argument that capitalism equals democracy, freedom, etc. So, once a real economic crisis arrives, the ruling class has a problem of ideological vacuum. Also, while capitalism is often equated with the American Way in the US, thus cementing social fissures of capitalism with nationalism, the same trick can't be used in Japan, in that capitalism is still thought of as vaguely foreign.
In terms of timing, the slump hit Japan just at the time when the Japanese ruling class was beginning to implement bits and pieces of neoliberalism--privatization, deregulation, budget austerity, etc. In this context, neoliberal policy--especially the financial deregulation aspect of it--is rightly associated in the public mind with the burst of the bubble, so the Japanese ruling class would have trouble arguing that more of the same would cure the economic ills. On the other hand, since a threat of depression is quite real, there is a contradictory pressure at home as well as from abroad upon the Japanese Government to cut taxes AND spend its way out of the slump WHILE opening the market (particularly finance) AT THE SAME TIME AS insuring that bad loans won't endanger financial stability--an impossible feat.
As for the relative lack of imperial power projection of the Japanese ruling class abroad even at the hight of its economic power, reasons are as follows: (1) lack of domestic support for such an enterprise; (2) the Japanese ruling class's (historically determined) inability to bid for cultural hegemony on an international scale; and (3) the Japanese ruling class owes its post-war prosperity to American policy needs dictated by the Cold War, trading ideological and military subservience for economic benefits. Of course, the third reason is the most important.
Yoshie