kokyū
The kokyū is a traditional Japanese string instrument, the only one played with a bow. The instrument is similar in construction to the shamisen, appearing like a smaller version of that instrument. It is 70 cm (28 inches) tall, with a neck made of ebony and a hollow body made of coconut or Styrax japonica wood, covered on both ends with cat skin (or snakeskin in Okinawa). It has three (or, more rarely, four) strings and is played upright, with the horsetail-strung bow rubbing against the strings.