Korean long board zither that originated in the 7th century. The kŏmungo is about 150 cm (5 feet) long and has three movable bridges and 16 convex frets supporting six silk strings. The front plate of the instrument is made of paulownia wood and the back plate is made of chestnut wood. Various pentatonic (pentatonic scale) tunings are used for different types of music.

The performer sits on the floor with the right end of the instrument supported by the knees. The strings are plucked with a pencil-size bamboo plectrum held in the right hand, while the left hand presses on the strings to play ornamented melodies and create vibrato. Generally only two of the strings are used for the melody while the others serve as drones or fixed pitches. A special tablature notation indicates pitch, rhythm, and fingering.