Mr Hirai, who was previously head of Sony's video games unit, took over as chief executive in April 2012, succeeding Sir Howard Stringer.
On Wednesday, Tsujihara announced a new management structure for the company's television, home entertainment and video games unit.
Analysts also point out that Sony needs to focus its resources on its strengths, like its entertainment and video games units, and abandon areas, like televisions, in which it is no longer competitive.
Mr. Hirai, who has been chief executive of the video game unit since December 2006, will continue to oversee the gaming business as the unit's chairman, Sony said.
More recently, he led the video game unit of Vivendi Universal.
FIFA 13 claimed 71percentnt of the UK's total video game unit sales last week and 80percentnt of its revenue".
Disney VR Studios, the company's video game unit, customized software, while the parks and resorts unit handled the heavy lifting of design and construction.
Sony's video game unit said yesterday that Ken Kutaragi, the father of the PlayStation game console, would no longer run its day-to-day affairs.
Over the next two-and-a-half years, they worked on concepts for a ping-pong game, gun games, football games, and volleyball games, all playable on a single switch-programmable video game unit.
Mr. Hirai, who is credited with resuscitating Sony's struggling video game unit, said he would focus on bolstering the company's core strengths, like digital cameras and video games.
But the delay also shifts Infinity from Disney's fiscal third quarter to its fourth, meaning that any chance of a turnaround at the company's video game unit will occur later than some investors expected.
