During the presentation of Sony's Q3 2017 financial ressults, they announced the resignation of their current President and CEO, Kazuo Hirai, to be replaced by Kenichiro Yoshida. Hirai's time at the top was defined by a return to profitability for Sony, and he will remain with Sony Corporation as Chairman.
https://www.notebookcheck.net/Kazuo-Hirai-steps-down-from-Sony-CEO-role-replaced-by-man-responsible-for-selling-off-VAIO.281374.0.html