Yamaha
From Sega Retro
The Yamaha Corporation (ヤマハ株式会社) is a Japanese company with a large number of product areas. Sales offerings include motorcycles (Yamaha Motor Corporation), musical instruments, integrated circuits, and home electronics. It was founded by Torakusu Yamaha as Nippon Gakki Co., Ltd. (日本楽器製造株式会社) in Hamamatsu, Shizuoka prefecture. Yamaha acquired Korg in 1989.
Yamaha produced the YM-2612 sound chip for the Sega Megadrive.