Rare 1980s Japanese Suiko ST-50 Koto Synthesizer. The Koto Synthesizer is an esoteric Japanese electronic musical instrument which reproduces traditional Japanese instruments.
Includes pitch bend control and volume control. Switch for Japanese/Western tuning, sustain switch, octave shift etc. Has a number of voices (Koto, Oboe, Japanese Bamboo Flute, Strings. Also includes an internal speaker and output and power jack.