1985 (Jun.)
Initially sold for ¥29,800
The Yamaha YK20 Music Keyboard is part of the YK family of keyboard controllers to be used with Yamaha's MSX computers along with the YK10 and YK01.
49 keys in a very light plastic shell, with a single cable terminating in a proprietary port to be used with the SFG01 or SFG05 modules. Even if this is supposed to be the larger model, the cable still can't be detached or extended, and it's so short it forces you to place the keyboard very close to the computer.