Masahiro Miki net worth: Masahiro Miki is a Japanese billionaire who has a net worth of $3 billion. Masahiro Miki is the founder of ABC-Mart, a discount retailer of shoes. Miki has accumulated an enormous wealth over the years making him the 10th richest man in Japan as of March 2013. Ever since 1985, when he founded the company, Masahiro has seen his company grow. Expanding its network both in Japan and abroad, ABC-Mart now has a significant number of 680 stores throughout Japan, as well as 120 across Korea, Taiwan and Hong Kong. In 2012, ABC reportedly spent $138 million to acquire LaCrosse Footwear, a NASDAQ-listed maker of premium work and outdoor footwear. But ABC-Mart's expansion doesn't end here, as Masahiro Miki is planing to extend LaCrosse throughout Asia and Europe. The stock price of the company is up 18% over the past year. Apart from making his business grow, Miki is a former amateur boxer. Also, he is married, but he doesn't have any children.