Sony officials say that the management change was decided internally within the unit. But the promotion of Mr. Hirai could place an executive sympathetic to Mr. Stringer's views high up in the game division, analysts say. Mr. Hirai, who was at the videogame unit's U.S. operations for 10 years, has worked with Mr. Stringer on joint marketing efforts in the U.S. Mr. Hirai is credited with the successful marketing efforts that helped turn the PlayStation into a powerful brand that dominated home gaming for much of a decade. He is also knowledgeable about software through his experience working with U.S. game publishers.
Analysts also say that Mr. Hirai's expertise in running the U.S. game business will be a valuable resource for Sony, which is facing particularly tough competition in its overseas markets. In the U.S. and Europe, Microsoft's Xbox 360 has momentum as it was released a year ahead of Sony's PS3, which was launched earlier this month. The company is also being squeezed by Nintendo's Wii game console, which has been winning accolades for its innovation.
Mr. Kutaragi has helped turn the PlayStation into one of Sony's most successful examples of hardware and software coming together. But Mr. Hirai could provide a balance to Mr. Kutaragi, an engineer, as the unit is increasingly called upon to collaborate on software with other divisions, analysts say.
"In contrast to Kutaragi, who is an engineer, Hirai is closer to software," says Yuta Sakurai, an analyst at Nomura Securities in Tokyo. "Now that the PlayStation 3 is out, however bumpy it was, it could be a message that they're focusing on software next."
After the success of the original PlayStation machine in 1994, Mr. Kutaragi, known as a talented engineer with a feisty temper, quickly moved through Sony's ranks. In 2003, he was charged with drafting a new strategy for all of the company's electronics businesses and was widely considered as a potential candidate for the top job.
But Mr. Kutaragi's fiery personality sometimes got in the way of efforts to work with his colleagues. By 2005, he was relieved of all responsibilities other than the videogame business.