Japanese Fist Protection Equipment (Japan Fist Law) Body (with white string) for Adults (Japan Fist Law) N-8) Specifications Shore with special sponge included white body cord This is a standard Japanese fist. The special sponge protects you and your opponent from injury. Requires an inner butt sold separately with this product. Mikos Fist Law products are officially licensed by the Japan Fist Law Association. We have received a large number of deliveries to the Japanese Fist Law, and Self-Defense Forces.