This is the Emishi flute from Negishi Shinobue Kobo. This flute's pitch is adjusted to match modern music (440-443Hz at 23°C). This flute is an ancient instrument from the Tohoku region. It is believed to have been used by the Emishi people in rituals, such as for burying and memorializing the dead. It was also likely used to encourage those suffering from the loss of a loved one or illness. (There are many tales and legends about the Emishi people in the Tohoku region.) It is also said to be the flute used by Minamoto no Yoshitsune in his childhood (Ushiwakamaru). It is believed to have been introduced from South America, but the details are unknown. The bamboo nodes are formed according to their purpose (the laws of nature). In the case of the Emishi flute, if certain conditions are met, regardless of the thickness, hardness, or length, the mouthpiece is opened just below the node, and finger holes are opened between the nodes, the flute will be tuned to a G key (standard Do-Re-Mi scale, six holes, three-hole tuning) at 15°C, producing a sound between 440-448Hz when played without blowing, just by resonating the tube. (The pitch is slightly higher than modern music.) From the Meiji era to the beginning of the Showa era, small elementary schools in mountain villages did not have organs. The Emishi flute was used to teach children nursery rhymes and folk songs of the area, bringing them joy. I have heard stories from people who sang nursery rhymes with the Emishi flute. They said it was very enjoyable and brought tears to their eyes when they remembered it. They said the Emishi flute was easy to sing with. I have been researching physics utilizing the laws of nature for many years and can identify bamboo that meets the required conditions. After the Great East Japan Earthquake of 3.11, I revived this flute with the aim of memorializing the deceased and to encourage those who are suffering. Many festival flutes in the Tohoku region are based on the Emishi flute, such as those used in hayashi (musical accompaniment) and kagura (sacred music and dance). (Examples include the Akita Kanto Festival, the Morioka Sansa Odori, the hayashi and kagura of the inland areas of Akita, Iwate, and Yamagata prefectures, and the kagura of the coastal areas of Iwate Prefecture.) Thickness: Approximately 25mm at the mouthpiece. Length: Approximately 41.4 cm. Mouthpiece size: Approximately 13.5 mm. Bamboo hardness: Normal. Thickness: Normal. Range: From the fundamental tone to the high tone 6 (a fingering chart is available). Due to the use of natural materials and handmade construction, there may be variations in color, shape, curvature, and scratches. Please note that price reductions are not possible. Thank you.