Hojo-undo are tonfa moves that fall between basic and kata in difficulty. You must learn these before using in combination to perform the kata.
Perform Tonfa Hojo-undo
This is the full form, or kata, for the tonfa, which means you should already have practice with the hojo-undo, or basic moves.
This video instructs you on how to perform kama hojo-undo alone. Hojo-undo means basic moves so this video is great for beginners. Once you get good at striking by yourself, you can move on to partners.
This tutorial teaches you how to perform Group 3 bo hojo-undo. It is strikes like group 1, but switching the grip between each one, and sparring utilizing the basic moves.
Bo subsidiary exercises are known as hojo-undo group 4, these are combination or more advanced moves, but still the basics used to create a kata.