Hiroshi Yamauchi net worth: Hiroshi Yamauchi was a billionaire Japanese businessman who has a net worth of $4.2 billion. At the time of his death, Hiroshi Yamauchi was one of the richest businessmen in Japan. Hiroshi Yamauchi earned his net worth as the founder and president of video game company Nintendo. During his career, Hiroshi was responsible for the success of plastic playing cards, Nintendo 64, Nintendo game cube and other Nintendo products as well as several Nintendo video games. He was also the majority owner of the Seattle Mariners baseball team, though he never attended a single game in person. Hiroshi Yamauchi was born in Koyoto, Japan on November 7, 1927 and died September 19, 2013 in Tokyo.