aido started in the mid-1500s. Hayashizaki Jinsuke Shigenobu (1542 – 1621) is generally acknowledged as the organizer of Iaido. There were a lot of people Koryu ( customary schools), however just a little extent remain today. Just about every one of them additionally concentrate on more seasoned school created amid 16-seventeenth century, in the same way as Muso-Shinden-ryu, Hoki-ryu, Muso-Jikiden-Eishin-ryu, Shinto-Munen-ryu, Tamiya-ryu, Yagyu-Shinkage-ryu, Mugai-ryu, Sekiguchi-ryu, et cetera.
After the collapse of the Japanese feudal system in 1868 the founders of the modern disciplines borrowed from the theory and the practice of classical disciplines as they had studied or practiced. The founding in 1895 of the Dai Nippon Butoku Kai (DNBK) 大日本武徳会 (lit. “Greater Japan Martial Virtue Society”) in Kyoto, Japan was also an important contribution to the development of modern Japanese swordsmanship. In 1932 DNBK officially approved and recognized the Japanese discipline, iaido; this year was the first time the term iaido appeared in Japan. After this initiative the modern forms of swordsmanship is organised in several iaido organisations. During the post-war occupation of Japan, the Dai Nippon Butoku Kai and its affiliates were disbanded by the Allies of World War II in the period 1945–1950. However, in 1950, the Dai Nippon Butoku Kai was reestablished and the practice of the Japanese martial disciplines began again.
In 1952, International Martial Arts Federation (国際武道院・国際武道連盟 ) (IMAF) was founded in Tokyo, Japan. IMAF is a Japanese organization promoting international Budō, and has seven divisions representing the various Japanese martial arts, including iaido.
In 1952, the All Japan Kendo Federation (ZNKR) was founded, and the All Japan Iaido Federation (ZNIR) was founded in 1948.
Upon formation of various organizations overseeing martial arts, a problem of commonality appeared. Since members of the organization were drawn from various backgrounds, and had experience practicing different schools of iaido, there arose a need for a common set of kata, that would be known by all members of organization, and that could be used for fair grading of practitioner’s skill. Two of the largest Japanese organizations, All Japan Kendo Federation (ZNKR) and All Japan Iaido Federation (ZNIR), each created their own representative set of kata for this purpose.