kuriwada debuts on our list following the december ipo of sG holdings, parent of Japanese package delivery service sagawa express. kuriwada, who has only a high school diploma, chairs the company and owns an 18% stake. his late father, kiyoshi sagawa, founded the company in 1957. Back in the 1990s the company was the focus of a big scandal: An executive at the Tokyo affiliate of sagawa express was convicted of making payoffs to politicians. sagawa, a billionaire in 1992, resigned as chairman that year; neither he nor kuriwada was charged.