There's a brief report published (in Japanese) on the Nikkei website this week that claims Metal Gear Solid creator Hideo Kojima has officially left Konami and is working to establish his own studio. 

However, the Nikkei report is thin on details -- no clear source is cited, and there's little hard data reported in story (which was quickly translated by NeoGAF users) other than the claim that Kojima's official last day as a Konami employee was December 15th. 

Still, that's well in line with previous reports on the issue. back in October the New Yorker reported that Kojima's final day at Konami was October 9th, though he had a non-compete clause in place that would expire in mid-December.

Now that it's mid-December, the Nikkei is reporting that Kojima is forming his new company with (at least some of) the people who worked with him at Konami.

It's yet unclear what the new firm's ambitions are, though the Nikkei report makes mention of negotations between Sony and Kojima to bring the studio's debut game to PlayStation ahead of other platforms.

Gamasutra has reached out to Konami representatives for further details on the matter, though we don't expect them to be forthcoming.