Gamesindustry.biz:

Sony has named Kaz Hirai as the successor to Howard Stringer’s roles as both president and CEO, effective April 1, 2012.Stringer, who has lead the company in the joint role for seven years, will take up the position of chairman of the board, whilst current chairman Yotaro Kobayashi will retire.

Hirai oversees Sony’s PlayStation operations. He’s been the most public face of Sony for gamers for a number of years now.