According to the New Yorker, Kojima left Konami on October 9th - Metal Gear Informer
The New Yorker reports that Hideo Kojima had his last day at Konami earlier this month, on October 9th. After working at the company for nearly 30 years, it seems this era has now come to an end. Simon Parkin, the author of the article, writes:
The departure ceremony, according to one of the hundred or so guests who attended, and
Nyxus