This useful file is for smoothing out the depression in which to set the string and rattan.
Size Withd 6mm, Made in Japan
Celluloid Sheet (Tortoiseshell Pattern, Thin) - Material for Making Shakuhachi Joint Rings, ¥800
Celluloid Sheet (Black, Thick) - Material for Making Shakuhachi Joint Rings, ¥850
Wooden Joint Section Insert L, ¥1000