Forbes recently published its 2012 list of Japan's 40 Richest. I sorted out the ones who are in the video game industry below in ascending order:
#39 Yasuhiro Fukushima - Net Worth $660 million
Founder of Enix, current largest shareholder of Square Enix.
#25 Hajime Satomi - Net Worth $1.15 billion
Founder of pachinko maker Sammy, now head of Sega Sammy.
#11 Hiroshi Yamauchi - Net Worth $2.7 billion
Former president of Nintendo, now its largest individual shareholder.
#7 Yoshikazu Tanaka - Net Worth $3.5 billion
Richest among the 4 listed here, and youngest in the top 40 list. Founder of GREE, a mobile social gaming company.
#39 Yasuhiro Fukushima - Net Worth $660 million
Founder of Enix, current largest shareholder of Square Enix.
#25 Hajime Satomi - Net Worth $1.15 billion
Founder of pachinko maker Sammy, now head of Sega Sammy.
#11 Hiroshi Yamauchi - Net Worth $2.7 billion
Former president of Nintendo, now its largest individual shareholder.
#7 Yoshikazu Tanaka - Net Worth $3.5 billion
Richest among the 4 listed here, and youngest in the top 40 list. Founder of GREE, a mobile social gaming company.