Extra strong string to wind, for instance, into the depression around the middle joint. Dia.:0.75mm,length:300m. Material: Vinylon (artificial fiber)
Cherry Tree Bark, ¥1320
Joint-Forming Tool SET, ¥23650
Middle Joint Insert Tool, ¥6050
Joint Forming Tool-L, ¥8470
Wooden Joint Section Insert M, ¥990