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Shotokan Kata · Advanced (Dan grade)

壮鎮Sōchin — “Strength and Calm”

Sōchin (壮鎮 — “Strength and Calm,” also “Immovable in the Storm”) is a 41-move black-belt kata defined by one thing above all: the deep, rooted fudō-dachi (“immovable stance”), used so heavily it is nicknamed sōchin-dachi. The kata is a study in grounded power and composure — it opens with the trademark muso-kamae (“incomparable posture”), a simultaneous rising and downward block, and closes through elbows, a long knife-hand run, a spear-hand and a spinning crescent kick. The two kiai fall on moves 30 and 41. Here is the verified walkthrough, meaning, bunkai, mistakes and grading.
Movements41
BeltDan grade
KiaiMoves 30 & 41
StanceFudō-dachi
OriginAragaki line

Move-by-move walkthrough

Step through all 41 movements. Use the arrows or press play. These are simplified schematics — pair them with the written sequence below and your instructor.

What Sōchin teaches

Sōchin is the kata of the immovable stance. Almost every technique is delivered from a deep, rooted fudō-dachi — so central to the form that the stance took the kata’s own name. Its lesson is strength held in calm: you generate heavy, whole-body power without losing balance or composure, staying planted like a rock while the storm passes. The name itself — “strength and calm,” or “immovable in the storm” — is the instruction.

Around that rooted core sit its set-pieces: the opening muso-kamae (a simultaneous age-uke and gedan-uke), twin back-fist-and-side-kick combinations into elbow strikes, a long six-count knife-hand run, a flat spear-hand, and — unique to Sōchin among Shotokan kata — a spinning crescent kick that flows into the final posture. It is one of three Aragaki-lineage kata in Shotokan, alongside Nijūshiho and Unsu, and its Shotokan form is credited to Gigō Funakoshi.

The rock in the storm. Fudō-dachi means “immovable stance.” Sōchin asks you to root into it and stay rooted — every punch, elbow and block driven by the ground and the hips, nothing rushed, nothing off balance.

The full sequence, written out

A text reference for the whole kata, following the JKA count.

#TechniqueStance / turn

Accuracy note: this follows the revised JKA count — 41 movements, kiai on 30 & 41, fudō-dachi dominant. Nakayama’s Best Karate Vol. 10 counts 40 (kiai 28 & 40), and SKIF/club renderings give 36 or 28 — same kata, different grouping. The opening posture is variously named muso-kamae / jōwan-nagashi + tate-uraken, and the spear-hand yoko-/ura-nukite. Per-move turn angles are the standard JKA embusen — verify against an Osaka or Kanazawa performance and your dōjō.

Signature techniques in this kata

Each links to a full breakdown in the techniques glossary.

Fudō-dachi不動立ち Musō-kamae無双構え Uraken + yoko-keage裏拳横蹴上げ Mae-empi-uchi前猿臂打ち Mikazuki-geri三日月蹴り Yoko-nukite横貫手

Bunkai — what the movements do分解

Read Sōchin as immovable power: absorb, root, and answer with heavy whole-body strikes.

Block high and low at once — moves 1, 6, 11, 31

Muso-kamae answers a two-level attack — a high strike and a low kick — in a single rooted posture, then feeds into the counter that follows.

Back-fist, side-kick, elbow — moves 15–17, 18–20

From the chamber, a back-fist and side snap-kick strike an attacker to the flank, and the front elbow finishes at close range — power to both sides in turn.

Spin into the crescent — move 31

The jōdan mikazuki-geri sweeps an attacking arm or head off-line as you turn, flowing straight into the rooted muso-kamae to face the next threat — the kata’s one flourish, and unique to Sōchin.

Honest caveat. Bunkai is interpretive; the same posture carries several valid applications. Treat these as starting points to explore with an instructor.

Common mistakes

A shallow fudō-dachi.

The immovable stance must be genuinely deep and rooted — hips down, weight even. A high, weak stance throws away the entire character of the kata.

Rushing the muso-kamae.

The opening posture is slow and strong, both arms arriving together with equal power. Snapping it or letting one arm lag breaks it.

Losing calm on the strikes.

Sōchin is strength and calm. Muscling the techniques with a tense, bobbing body misses the point — the power should come from the ground and hips, not agitation.

A floaty crescent kick.

The spinning mikazuki-geri must stay controlled and flow directly into the rooted stance, not throw you off balance out of the turn.

How Sōchin is graded

As a dan-grade kata, Sōchin is judged above all on a deep, stable fudō-dachi held throughout, a strong balanced muso-kamae, heavy hip-driven power with composure (strength and calm together), clean back-fist / side-kick / elbow combinations, a controlled spinning crescent kick, and the two kiai on moves 30 and 41. Examiners look for the “immovable” quality — rooted, unhurried, powerful. Requirements vary by association — confirm with your dōjō.

Watch a reference performance演武

The illustrations on this page are study schematics — they show the shape of each move, not a real body in motion. To see Sōchin performed at full speed by senior instructors, watch reference footage:

▶ Watch “Sōchin” performances on YouTube

Opens a YouTube search in a new tab. Look for JKA / Japan Karate Association or established Shotokan instructor demonstrations for the most standard version of the form.

What to learn next

Or explore the full kata library.

Sōchin — frequently asked questions