Red Oak 4.2 Shaku Jo (8 Bu) Jodo (Jojutsu) Jojutsu, Karate, Aikido. The origins of Jodo and Jojutsu date back to the Edo period, when Muso Gonnosuke Katsuyoshi, born in Katori, Shimousa Province (Katori District, Chiba Prefecture), lost a match to the swordsaint Miyamoto Musashi. After rigorous training, he established Shinto Muso-ryu Jojutsu, and in recent years it has become the All Japan Jodo Federation, with many enthusiasts both domestically and in countries around the world. Includes a moisture-prevention bag (can also be used as a waterproof bag). Among wooden products, oak is a strong and hard material.