Population: 125.2 million
Percentage of millionaire households: 2.9%
As Japan is slowly recovering from the nuclear fallout following the March 2011 earthquake, the country saw its number of millionaire households decline to 1,587,000 last year. Better news on the country's economy this year: Japan's gross domestic product expanded faster than estimated in the first quarter of 2012, rising 4.1 percent. Japan's richest man is Tadashi Yanai. The founder of clothing retailer Uniqlo is worth more than $11 billion, according to data compiled by Bloomberg.
Data from: Boston Consulting Group and Bloomberg Billionaires
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