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Iaidō · All Japan Kendo Federation · sword forms

Seitei iai: the 12 standard iaidō forms — history and structure 制定居合

A kneeling swordsman, eyes forward, hand resting on the hilt. Nobody else is in the room — yet every movement answers an attacker who is. Seitei iai is twelve short scenes like this, chosen from the old sword schools so that a kendō player in Tokyo and an iaidōka in Lisbon can be judged on exactly the same thing.

IaidōKendo
Official nameZen Nippon Kendō Renmei Iai (全日本剣道連盟居合), “Zen Ken Ren iai”
Created1969 (7 forms); 3 added in 1980; 2 added around 2000 → 12
Drawn fromMainly Musō Jikiden Eishin-ryū, Musō Shinden-ryū and Hōki-ryū
Starting positions1–3 seiza (formal kneeling) · 4 tate-hiza (one knee raised) · 5–12 standing
1

1966: Japan holds its first national iaidō championship. The judges face a problem — every competitor comes from a different school, with different forms and different rules.

2

A committee of senior teachers sits down with the old schools’ forms and picks the essentials: sit, draw, cut, clean, sheathe.

3

In 1969 the result is published: seven forms that every member of the kendō federation can learn. Today there are twelve.

Illustrative scene, not a historical record.

History

  1. The old schoolsThe art of drawing and cutting in one movement grew out of sword schools from the late Muromachi period (16th century). By the 20th century dozens of schools (koryū) survived, each with its own forms. The word iaidō itself only became common in the 1930s. [1][2]
  2. 1966–1969 · a common languageThe All Japan Kendo Federation (founded 1952) held its first iaidō championship in 1966. To make judging and grading possible, a committee chose basic techniques from the main schools; in May 1969 the federation published seven standard forms. [1][3]
  3. 1980 and 2000 · from 7 to 12After a partial revision in 1976, three standing forms were added in 1980 (Ganmen-ate, Soete-tsuki, Shihōgiri). Two more — Sōgiri and Nukiuchi — followed at the turn of the century: the federation gives 1999, other sources 2000. The manual was rewritten in plainer language in 1988 and revised again later. [3][1][4]
  4. TodaySeitei iai is the most widely practised iaidō in the world because kendō federations use it for grading and competition. The federation itself stresses that it is a starting point: students are expected to study a classical school as well. [4][3]

Historical images

Nakayama Hakudō
Nakayama Hakudō (1872–1958), founder of Musō Shinden-ryū — one of the schools the seitei forms draw on — and the teacher who made the word “iaidō” popular.

Nakayama Hakudō.jpg — Public domain, via Wikimedia Commons.

The sequence, step by step

A summary in our own words to help you follow and remember the form. It does not replace a teacher, and details differ between associations. [4][3]

Seitei iai floor plan: most forms advance and return to the start; some turn to the back, the sides or the diagonals (S = start)SS: draw · cut · clean · sheathecut forwardback to S
Seitei iai floor plan: most forms advance and return to the start; some turn to the back, the sides or the diagonals (S = start) — Simplified diagram.
  1. Step 1/5

    Every form · four parts

    Nukitsuke (the draw that is already a cut or a threat), kiri-oroshi (the finishing cut), chiburi (flicking the blood off the blade) and nōtō (returning the sword to the scabbard), all framed by bows to the sword and the dōjō.

  2. Step 2/5

    1–3 · from seiza

    1 Mae: an opponent sits in front — cut first across the face, then down. 2 Ushiro: the opponent is behind — turn on the knees and cut. 3 Ukenagashi: an attack from the left — rise, deflect the blade over your head, cut diagonally.

  3. Step 3/5

    4 · from tate-hiza

    Tsuka-ate: two opponents, front and back. Strike the one in front with the end of the hilt, thrust behind, then finish in front.

  4. Step 4/5

    5–10 · standing

    5 Kesagiri: rising diagonal cut, then down the other diagonal. 6 Morote-tsuki: three attackers, two in front and one behind; the two-handed thrust gives the form its name. 7 Sanpōgiri: right, left, front. 8 Ganmen-ate: hilt to the face, thrust behind. 9 Soete-tsuki: a thrust with the left hand guiding the blade. 10 Shihōgiri: four attackers on the diagonals.

  5. Step 5/5

    11–12 · the newest

    11 Sōgiri: five cuts in a row against one opponent who keeps coming. 12 Nukiuchi: step back from a cut to the head and answer with a single draw-and-cut from above.

Key stances

Kendo chūdan: right foot ahead, left heel slightly raisedFRONT▭ = 1 shoulder widthRheel raisedLWeight ≈50% frontback 50%
Chūdan-no-kamae (kendo middle guard)

All stances, with diagrams →

Meaning

制定 (seitei) means “established” or “standardised”: these are forms set by a federation, not inherited from one master. That is their strength and their limit. They give everyone a shared grammar — the same draw, the same cut, the same ending — and so a fair basis for grading.

But each form is still a scene with an opponent. Seme (pressure), timing and zanshin (staying alert after the cut) are what turn the correct shape into iaidō.

Variations between styles

Style / bodyWhat changes
AJKF / national federationsThe 12 forms in the official order, judged in grading and in shiai (competitions pair seitei forms with forms from the competitor’s own school).
Classical school flavourSmall details, such as the chiburi or the way of sheathing, can show a practitioner’s koryū background; the manual sets the standard to follow in grading.
Other federationsThe All Japan Iaido Federation (ZNIR, founded 1948) has its own standard set, different from the AJKF forms.

[4][2][3]

Principles and applications

Iaidō is never sparred, so “application” means imagining the opponent clearly. In Mae he is about to draw: your horizontal draw must reach his face before his blade leaves the scabbard. In Ukenagashi his cut comes down from the left: the raised blade lets it slide off, the body steps out of line, and the counter-cut uses the energy already moving.

Practise slowly with a practice sword (iaitō), always with safe space around you. Grading asks for correct reihō (etiquette), clear targets, a straight cutting line, and zanshin until the sword is fully sheathed.

Common mistakes

  • Drawing with the arm only, without the scabbard hand pulling back (saya-biki).
  • Cutting without a clear target or height.
  • Rushing chiburi and nōtō — the form ends only when the sword is home.
  • Looking at the sword instead of the imagined opponent.

[3][1]

Sources

Content written by Wabukan from the sources below (checked on 2026-10-30). External links are references only.

  1. All Japan Kendo Federation (AJKF) — The concept of iaido — kendo.or.jp
  2. Wikipedia — Iaido (Seitei-gata) — en.wikipedia.org
  3. ZNKR Iai — English edition of the AJKF iaido manual (PDF, hosted by iaido.kg) — iaido.kg
  4. Wikipedia — Zen Nippon Kendō Renmei Iaidō (seitei iai) — en.wikipedia.org

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Wabukan (2026). Seitei iai: the 12 standard iaidō forms — history and structure. https://wabukan.com/formas/seitei-iai (accessed 2026-10-30)
<a href="https://wabukan.com/formas/seitei-iai">Seitei iai: the 12 standard iaidō forms — history and structure — Wabukan</a>
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Updated: 2026-10-30