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Matayoshi Kobudo Kodokan hombu dojo.
Hayasaka Yoshifumi
Suruchin No Kata.
The surujin or suruchin is one of the traditional weapons of Okinawan Kobudo. It comprises a 2–3 metre long rope with a weight tied to each end. Historically this weapon is very prevalent and can be found attached to a weapon or used separately. It is a weapon designed for warfare.