I am only half kidding..Does'nt Yamaha still hold an interest in Korg USA?
Apparently not according to wikipedia:
"Yamaha Corporation has always been a major partner of Korg, supplying them with circuitry and mechanical parts. In 1987, shortly before the release of the M1 Music Workstation, Yamaha acquired a controlling interest in Korg's stock. The takeover of the company was amicable, with Kato drawing up the terms, and the two companies continued to independently develop their product lines and compete in the marketplace. After the following 5 very successful years, Kato had enough cash to rebuy most of the Yamaha share back in 1993, something that has gone unnoticed to many except maybe the shareholders."
Full text can be read
here .
Paul.