Sony Corp.'s Tokyo headquarters is changing its usual arm's-length relationship with its U.S. studio following a massive cyberattack and the controversy over the comedy "The Interview," with the group CEO being consulted on key decisions, company officials said.

Before the devastating hack, Sony Pictures Entertainment Inc. was relatively independent of the Tokyo headquarters, despite the company's slogan that it is "One Sony" across an empire of movies, music, gadgets and even insurance.

But group CEO Kazuo Hirai has become more involved after the hacking, which debilitated Sony Pictures' computer network and led to the online leaks of unreleased movies and embarrassing email. It is considered the biggest attack of its kind on U.S. soil.