A tune-up unit secretly used by Kazumasa Nakai. A secret unit created by combining ultra-fine ties created from daily experience on the Tairaba ship "Kairyu", captained by field tester Kazumasa Nakai. Nakai himself found that the straight curly cut in half and the straight were combined to show their true value especially when they were bitter, and commercialized. Captain Nakai's whole body unit that customers absolutely want to fish.Hook specifications : Kohga Hook SS (SagSas) SSS size x 2 + PE6 step