Mark Cerny (Sonic 2, Marble Madness, et cetera) showing Michael Jackson around at Sega in 1988.
Update: Cerny confirms that this was indeed 1988, at the Sega of Japan office. Commenters have suggested that the young child with him is Jimmy Safechuck, with whom Jackson acted in a Pepsi commercial.
Update 2: Cerny adds: “For what it’s worth, the monkey stayed in the limo and did NOT take part in the tour. Not a joke.”