Bloomberg -- Wealth among Asia-Pacific millionaires may top North America’s as soon as next year as Japanese economic growth boosts investor returns in the country, a report by Cap Gemini SA and Royal Bank of Canada showed.

Asians with at least $1 million in investable assets are expected to see their riches climb to $15.9 trillion by 2015 from $12 trillion last year, according to the 2013 Asia-Pacific Wealth report, released today. North American high net-worth individuals held $12.7 trillion in 2012.

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