This is the first in a series of three katas, the names of which all start with the letter "J". Jion introduces several movements for the first time, and puts emphasis on teaching a student how to deal with rotational movements, and directional shifts. Jion introduces several new techniques, a series of three consecutive chudan-teisho-yoko-uke (middle level side palm heel block), and chudan-uchi-otoshi (middle level falling block). It should be noted that all of the mae-geri (front kicks) are performed at jodan (upper level).
This kata contains 47 movements and should also take the student approximately 60 seconds to complete. The correct performance of this kata is required in order to advance in rank from 3rd kyu (brown belt) to 2nd kyu (brown belt).
There are two kiai points in Jion. The first one occurs on the chudan oi zuki (middle level punch) at the top of the embusen (line of attack). The second one occurs on the very last movement of the kata, chudan-yoko-zuki (middle level side punch).
To return to a ready position after the last movement of the kata leave your left foot in place and withdraw your right foot so as to stand up once again facing forward in hachiji-dachi (natural stance). Finish with your hands in the Yoi (ready) position identical to the start of the kata. You must now formally end the kata. You do this by bringing your left foot half way in towards your right foot and your right foot half way in towards your left foot so that you are now standing with your feet together. At the same time as you bring your feet together also bring your hands to your sides so you are again standing in heisoku-dachi (attention stance). Now rei (bow). After bowing, step out with your left foot and then your right foot and once again stand in hachiji-dachi (natural stance) while at the same time bringing your hands from your sides and hold them in a ready position in front of you with your fists closed.