Yoseikan practitioners under Mochizuki Minoru were required to do a considerable amount of cross training in order to gain teaching credentials. This included gaining a minimum of a blackbelt in Judo in addition to training in Aikido, Karate and Katori Shinto Ryu and a brief six months training in Gyokushin-ryū Jujutsu under Sanjuro Oshima (he never fully learned it but decades later tried reconstruct Gyokushin-ryū techniques after witnessing Wrestling suplex throws in France). Techniques found in jojutsu and iaido were also included.