Rare Yaeyama Kuroki (Yonaguni-grown) four-split wood. This valuable material was taken from a precious log over 300 years old, making it a difficult-to-obtain Kuroki today. Recommended for those looking for materials for sanshin production, material collection, or processing. If you are a true enthusiast or looking for rare materials, please consider this. Weight: 2.5kg #SanshinRawWood #YaeyamaKuroki #ForSanshin