Red Oak 4.2 Shaku Jo (8 Bu) Jodo (Jojutsu) Jojutsu, Karate, Aikido. Among wooden products, oak is a strong and hard material. The origins of Jodo and Jojutsu: In the Edo period, Muso Gonnosuke Katsuyoshi, who was born in Katori, Shimousa Province (Katori District, Chiba Prefecture), lost a match against the swordsaint Miyamoto Musashi. After rigorous training, he founded Shinto Muso-ryu Jojutsu, and in recent years it has become the All Japan Kendo Federation, with many enthusiasts both domestically and in countries around the world.