This useful file is for smoothing out the depression in which to set the string and rattan.
Size Withd 6mm, Made in Japan
Line Cutter, ¥1800
Joint-Forming Tool-M, ¥8500
Joint-Forming Tool SET, ¥24000
Celluloid Sheet (Tortoiseshell Pattern, Thin) - Material for Making Shakuhachi Joint Rings, ¥800