Though to some this looks like dangerous bullying of the Bank of Japan, the debate is actually a healthy one, says Robert Feldman, chief economist at Morgan Stanley in Tokyo.

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One difference, according to a 2002 University of Massachusetts study conducted by psychologist Robert Feldman: Women are more likely to lie to make other people feel good, while men tend to lie to make themselves look better.

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"When the senior management at any institution is diverted from thinking about the key policy issues, response time can get longer, and in that sense the difficulties have made the Japanese economy more vulnerable to any other shocks that might come along, " says Robert Feldman, chief economist for Japan at Morgan Stanley.

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