Shakuhachi Bamboo Flute, 5 Holes, "Hotarudou" Engraved

Bamboo Shakuhachi with Orange Cloth Bag - Features 5 Tone Holes

- Bag Color: Orange
- Material: Bamboo
- Shape: Shakuhachi Body - Approx. 47.5 cm
- Number of Holes: 5 Holes

Thank you for looking.
This item has been stored in the back of a shelf for many years. I am not knowledgeable about shakuhachi, but my friend said it had a good tone when they played it (I cannot produce sound myself).
The dimensions are approximately shaku roku (a traditional length measurement).
It has a Hotaru Dou (螢童) brand mark.
The mouthpiece appears to be made of buffalo horn and, based on its shape, seems to be in the Tozan style. However, this part is not made of bamboo but rather a hard wooden material. If this has significance, it may add value, but it's an unusual shape not commonly seen. Also, there is a crack of about 3cm (see photo 9), which I believe is not a problem, but I wanted to mention it.