Japanese businessman and billionaire Keiichiro Takahara comes with an estimated net worth of $4.6 billion as of May 2015 according to Forbes.Now based in Japan, Keiichiro Takahara is married with three children. Besides being the founder, Keiichiro Takahara now serves as the chairman ofUnicharm, a company which specializes on producing sanitary napkins, diapers along with other kinds of private health care products. In 2012, the selling of adult diapers astonishingly surpassed the sale of baby diapers. This might result from the reality that Japan is now having an aging population. In the previous year, company’s stock price increased by around 25% as a result of the increasing sales in China and India. Unicharm is all about to open its fifth manufacturing plant in 2013. The business also intends to enlarge its operations to other parts of Asia which include Vietnam, Thailand, Korea, Taiwan, and Indonesia.