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Hojo Undo

Hojo undo (補助運動) translates roughly as "supplementary exercises" and refers to the traditional conditioning system developed within Okinawan karate. It consists of a specific set of tools, each designed to build physical qualities that solo kata practice and partner work alone cannot fully develop.

Core hojo undo implements include the makiwara (striking post for power and alignment), chi ishi (weighted lever for grip and rotational strength), nigiri game (gripping jars for hand and forearm conditioning), and kongoken (a heavy oval weight for full-body conditioning). Each tool addresses a specific aspect of the karateka's physical development, and together they form a complete supplementary training system.

Hojo undo is deeply embedded in the traditional Okinawan styles, particularly Goju-Ryu, Shorin-Ryu, and Uechi-Ryu, where it is treated as an integral part of training rather than an optional addition. Its principles emphasise gradual, consistent conditioning over time, developing the body's capacity to deliver and receive force without injury. The system reflects the broader Okinawan martial philosophy: that effective technique requires a prepared body, built through deliberate, repeated practice with purpose-built tools.

Related article: The Makiwara: Okinawa's Striking Post and Its Place in the Modern Dojo

Karate is not a game. It is not a sport. It is not even a system of self-defense. Karate is half physical exercise and half spiritual. The karateist who has given the necessary years of exercise and meditation is a tranquil person. He is unafraid. He can even be calm in a burning building.
Mas Oyama

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Hojo Undo
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