Jion
Jion is a Shuri-lineage kata and a documented first designated form in the JKF Shotokan column.
JKF
Japan Karatedo Federation
The Japan Karatedo Federation is Japan’s national Karate federation, coordinating regional, school, workplace and style organisations, competition, qualifications and national teams.
Karate Competition Rules
Karate competition rules differ by organisation and event; this guide explains current JKF kumite and kata rules, scoring and major limitations.