This flute is made to the same specifications as the Shishida and Maruyama shinobue flutes. Most beginners can play the lower notes, but many struggle to play the higher notes or the even higher "pi" sound. Many people are also unsure if the flute they are currently using is actually producing the correct sounds. This flute is made based on the opinions of instructors from various regions (easy to produce the "ko-on" - high register, clear "dai-ko-on" - highest register, and affordable). It is recommended that beginners, rather than buying an expensive flute first, learn to produce the "ko-on" and "dai-ko-on" sounds, then go to a shop and try out different flutes to find one that suits them. (Some flutes may look good but not produce the "dai-ko-on" sound). Also, it seems that progress is faster if you start taking lessons after you can already produce the basic sounds. To prioritize ease of playing, sound, resonance, and affordability, there may be scratches, natural shapes, natural patterns, and natural bends. A 10mm ball is placed in the image for reference of the hole size, etc. Thickness: Approximately 19.8mm at the mouthpiece Length: Approximately 42.3cm Mouthpiece size: Approximately 14.2mm The thickness is slightly thinner. (Thicker flutes have better low-frequency resonance, while thinner flutes produce better "dai-ko-on" sounds.) Wall Thickness: 2.5 on a scale of 5 (Thicker walls produce better "dai-ko-on" and sound, while thinner walls are easier to play.) Pitch: Approximately Roppon (six-hole) Compatible with the fingering for pressing the second and third holes from the bottom. Range: Beautifully produces sounds from the "tsutsu-ne" (lower register) to "dai-ko-on 5" (highest register). About Yaki-take (Burnt Bamboo): This is the best material for sound production among shinodake bamboo. When the bamboo is thoroughly burned, it becomes hard and produces a better sound. However, there is a shortage of materials that meet the conditions, and it is difficult to process. It is also characterized by even better sound production when made naturally. Bamboo grows by competing for light. Therefore, the bamboo that wins the competition for light is the most suitable for flutes. (I have been researching the physics that utilizes the laws of nature for many years, so I can identify bamboo that meets the required conditions.) About Suke-nuri (Transparent Lacquer) Finish: Because no pigments are used in the lacquer, it is easier to produce sound. Also, by carving grooves inside and allowing the lacquer to soak in, the sound becomes even easier to produce and the resonance improves. Please note: The "ko-on" and "dai-ko-on" sounds are very easy to produce. When playing strongly, please make sure there are no people around. Please be especially careful with small children, the elderly, people with disabilities, and those who are not feeling well. Regarding discounts: Due to being handmade, discounts are not possible.