TOKYO (Reuters) -Sony Group said on Thursday its gaming chief Jim Ryan would retire next March, with group President Hiroki Totoki to become interim CEO during the search for a successor. Ryan, who is British, become CEO of Sony Interactive Entertainment (SIE) in 2019 and oversaw initiatives including the launch of the PlayStation 5 console the following year. Totoki would serve as interim CEO for a year at most and it is possible a successor could be appointed by the time Ryan retires, a Sony spokesperson said.