Ichigenkin (one-string koto) Suma-koto It seems to be a musical instrument. I don't know how to use it. The parts are all in the photos. It's been stored for a long time, but it's new and unused. I don't see any scratches. The strings were wound up, so they're in the condition shown in the photos. I took the photos without knowing much about it, so please feel free to ask if you need more photos or have any questions.