Jo katák páros jo-ken 6 jo kata partner practise 1 jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique6 jo kata partner practise 2 jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique6 jo kata partner practise 3 jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique13 jo kata partner practise 1 jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique13 jo kata partner practise 2 jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique22 jo kata partner practise jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique31 jo kata partner practise jo -ken ( staff vs boken) [TUTORIAL] Aikido advanced weapon technique