This is a shakuhachi, size 10, with the "Kyochiku" mark, supervised by Katsuya Yokoyama. It is a wooden shakuhachi made of maple. The sound is mellow and maintenance is easy. The joint has been adjusted with aluminum tape. There is no looseness. Please judge the details from the photos. Kyochiku is no longer in production. Please understand that this is a used item (vintage) and that the assessment is based on a layman's judgment before purchasing.