A worldwide competition of rescue technology using rope “Grimpday” was held in Belgium from June 1 to 2. It is a tournament aiming to compete for rescue activities using equipment based on worldwide standards and various methods of each country as competition, to improve rescue techniques in actual disasters, and to standardize rescue techniques using ropes. In the Japanese team of 2018, volunteer relief officials, mainly fire fighters in the Okinawa district, formed a team. Empathizing with the Japanese team with a high will, G – SHOCK supported the team with MUDMASTER.