Hojo Undo are the supplementary training exercises of Goju-ryu.

Hojo Undo - Etiquette for using training equipment
Hojo Undo - Etiquette for using training equipment
If you wish to use a piece of training equipment you must bow to it as if you were training with a partner. You show respect to the equipment as it is going to assist you in become better at Karate. Before you use the equipment say 'Onegaishimau' (please let me use you) and when you are finished say 'Domo Arigato' (thank you for letting me practice with you. All equipment must go back exactly where you found it to keep your Dojo clean and tidy.
CHISHI - Stone Lever Weight
CHISHI - Stone Lever Weight
The Chishi is used to create power of the wrist, grip and to develop the forearm for striking techniques. Chishi is usually made of cement with a thick handle to simulate a wrist.
Nigiri Game - Gripping Jars
Nigiri Game - Gripping Jars
Nigire Game is designed to strengthen the grip, a necessary weapon of effective self defence. The gripping exercises are combined with footwork drills for further intensity. Water or sand can be added to the jars to make them heavier and harder to grasp.
Kongoken - Iron Ring
Kongoken - Iron Ring
Kongoken was created after Chojun Miyagi traveled to Hawaii to teach Karate. While he was there he saw a sailor working out with the link of an anchor chain and took the idea and adapted the exercises to be more specific to Goju-ryu movements such as throws and more.
Ishi Sashi - Stone Padlocks
Ishi Sashi - Stone Padlocks
The ancient kettle bell, these were originally heavy stone padlocks. Used to strengthen aspects of the whole body, they can be used to improve Kata specific moments right through to basic punching, kicking and blocking.
Punching Bag - Heavy Bag Workout
Punching Bag - Heavy Bag Workout
Performed by: Sensei Tetsuji Nakamura Punching bags and heavy bags provide a more free moving target and enable the practitioner to strike the bag from all angle with basically any technique. The bag can be stuck lightly to build speed and timing, hard to build striking power or with a combination of speed and strength to develop real fighting skill.