The Aikido Jo, along with the bokken and tanto, is one of three wooden weapons used in the practice of Aikido and staff kata. It has its origins in the Shindo Muso Ryu - a koryu or "old school" martial art. The Kingfisher jo is made in 1 inch or 15/16 inch diameter and various lengths to fit personal needs.
The jo straight staff of unassuming character, linked historically with the Japanese sword. When compared with a live blade, it has some distinct advantages that make up for its simple shape and lack of a cutting edge. Unlike a sword, a Jo may be unexpectedly wielded from either end or any point in between. It also has a few more inches of reach than a sword. Although many weapons arose as a defense against the sword, some very effectively, the Jo is most notably associated with schools arising from traditional kenjutsu and is now used in the disciplines of Aikido and Jodo. Staffs are inconspicuous and, owing to their elegance and simplicity, are preferred by some martial artists above all other weapons.
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I should have replied sooner, but Thank you! I love the Jo. It is better than I had imagined, you did a great job with the custom "Yuugen" kanji. Satisfied customer!