Zen Nippon Kendō Renmei Iaidō is the iaidō style of the All Japan Kendo Federation (AJKF, Zen Nippon Kendo Renmei or ZNKR).
[1] The AJKF was founded in 1952, immediately following the restoration of Japanese independence and the subsequent lift of the ban on martial arts in Japan.
In 1969, the AJKF introduced its seitei curriculum of seven standardised iaido kata.
[1] The twelve seitei-gata are standardised for the tuition, promotion and propagation of iaido within the kendo federations.
Although not all kendo dojo teach seitei iaido, the AJKF uses them as a standard for their exams and shiai.