Iaidō (居合道) is the modern Japanese way of drawing the sword: a discipline of solo forms in which a swordsman, beginning from rest, draws, cuts, clears the blade and returns it to the scabbard in a single composed sequence. It descends from the older fighting arts of iaijutsu and battōjutsu and from the classical iai schools of the Edo period, but as one named discipline with a shared, standardised syllabus it is a creation of the twentieth century. The set of forms practised across the world today was issued by the All Japan Kendo Federation from 1969, while the old schools that fed it continue to teach their own forms under their own lines.
The art of drawing the sword
Iai, in its narrowest sense, is the art of responding to a sudden threat by drawing the sword and cutting in the same motion, rather than fighting with a blade already bared. A typical form begins from a position of rest, seated in seiza or tate-hiza, or standing, and resolves a confrontation in a few movements: the draw and first cut (nukitsuke), the finishing cut (kirioroshi), the symbolic shaking of blood from the blade (chiburi), and the careful return of the sword to the scabbard (nōtō). The practice is almost entirely solo, performed against imagined opponents, and the added syllable dō, the "way", marks it as a path of self-cultivation rather than only a method of killing. Most practitioners train with a blunt unsharpened iaitō; some advanced exponents use a sharp blade, a shinken, for cutting practice.
Drawing and resheathing the sword as a discipline of composure: the readiness before the cut and the calm after it.
From iaijutsu to iaidō
Tradition traces iai to Hayashizaki Jinsuke Shigenobu, a swordsman of the sixteenth century whose life is largely legendary; he is remembered as the origin figure of the art, iai no shiso, rather than as the founder of any one surviving school. From his line and from others descended the great iai traditions of the Edo period, several of which carry their own articles here: Musō Jikiden Eishin-ryū and Musō Shinden-ryū, the two most widely practised, together with Tsuji Gettan's Mugai-ryū, Tamiya-ryū, Suiō-ryū and Hōki-ryū. These were jutsu, the practical fighting arts of their domains. The shift in name from jutsu to dō belongs to the modern budō movement of the late nineteenth and early twentieth centuries, encouraged by bodies such as the Dai Nippon Butokukai (founded 1895); the word iaidō came into common use through the generation of teachers around Nakayama Hakudō (1872–1958), who did much to re-establish sword-drawing as a recognised modern discipline.
The federation and the standard set
By the middle of the twentieth century iai survived in many separate koryū, each with its own forms, names and grading, which made it hard to teach, compare or examine across schools. To give practitioners a common ground, the All Japan Kendo Federation (Zen Nihon Kendō Renmei, 全日本剣道連盟, founded 1952) assembled a standardised set of forms, the Seitei iai (制定居合), first issued in 1969 with seven forms and later enlarged to the present twelve. The set was drawn deliberately from several established koryū so that members of different schools could share a syllabus and be examined together. These seitei forms are now the common language of organised iaidō in Japan and, through the International Kendo Federation, around the world. A separate body, the All Japan Iaidō Federation (Zen Nihon Iaidō Renmei), maintains its own standard set assembled from a group of koryū; honest practitioners are careful to distinguish these modern standards from the older schools the forms were drawn from.
Grading and the koryū today
Iaidō is practised almost entirely as solo kata, and students advance through kyū and dan ranks examined on the standard forms, judged on precision, posture, timing and intent rather than on contact with an opponent. Many who practise iaidō also study a classical school, so a single person may hold a modern federation grade and, quite separately, a transmission within an old line. This double life is characteristic of the discipline: the standardised way binds a national and international community, while the koryū preserve the depth and variety from which that standard was drawn. Stewardship of the modern way rests with the federations rather than with a single headmaster, and the classical lineages are documented in their own articles.
What iaidō is, and is not
Iaidō is best understood as a modern way built on old material. It is not a single ancient school with one founder and one unbroken line; its standardised forms are recent, even where the techniques behind them are centuries old. Nor is it a combat sport in the manner of kendō: there is no live opponent, no contact and, in the standard set, no free sparring, only the disciplined repetition of forms. Describing it fairly means holding both halves at once, the modern federation standard and the living koryū beneath it, and refusing to collapse one into the other.