Extra strong string to wind, for instance, into the depression around the middle joint. Dia.:0.75mm,length:300m. Material: Vinylon (artificial fiber)
9-Blade Saw for Joint Making, ¥3850
2-rin rattan (width:0.6mm), ¥12650
Cherry Tree Bark, ¥1320
Celluloid Thin, ¥715
Middle Joint Rasps A+B, ¥19580