9. Hiroshi Mikitani, CEO of Rakuten
Net worth: $9.3 billion
Ranking among world's tech billionaires: 23
Hiroshi Mikitani, CEO of Rakuten, at an event in Munich, Germany, Jan 24, 2012. [Photo/IC]
Summer Davos 2015
Zhanjiang on Maritime Silk Road
CEO roundtable: 'new normal' & challenges