The ZNIR was officially formed and registered with the government on May 5, 1954 by Iaido practitioners from multiple styles.
The All Japan Iaido Federation was founded in 1948, and recognized officially as an organization with the Japanese Government in 1954.
Each Chiku Renmei(district) also hold their own local Iaidō tournament and exam.
[3] The All Japan Iaidō Federation grants ranks similarly to other Japanese martial arts organizations, with Dan and Shōgō (titles) both granted to practitioners once they reach certain levels of competency and skill.
For example, after Roku Dan and a certain amount of time has passed, the practitioner will test for Renshi at their next grading.