And Japan's richest person is.... By: CNBC.com News April 03, 2014 at 01:42 AM EDT Masayoshi Son, the man behind Japan's leading internet venture Softbank, is the country's wealthiest individual with a net worth of $19 billion, according to Forbes. Read More >> Related Stocks: ABC Mart Inc Fast Retailing Co. Ltd Rakuten Group Inc Sentinelone Inc Cl A Seven & I Holdings Co. Ltd