百者
Styles Philosophy Masters Training
Okinawa ·From Chinese models in the 18th/19th centuries; as a canon in the early 20th ·No single person; assembled as a system by Miyagi Chōjun (1888–1953)

Hojo Undo — Strength Training Organised by Technique, Not by Muscle

Okinawa's strength training organises its tools by technique rather than by muscle group. And the kongoken proves the tradition was never closed.

hojo undo chishi nigiri game kongoken okinawa goju-ryu strength training grip strength
Contents

Hojo undo (補助運動, “supplementary exercises”) is the collective term for the equipment training of Okinawan karate — stone weights, gripping jars, an iron ring, a striking post. Seen for the first time, it is easily mistaken for a folkloric precursor of the weights room.

It is not, and the difference is fundamental. A gym plan organises exercises by muscle group: back today, chest tomorrow. Hojo undo organises them by technique: this tool belongs to this movement, at this angle, with this grip. What is trained is not a muscle but a movement under added load.

That is not an eccentricity of old masters but an answer to a real problem — and the same answer modern sports science gives under the heading of specificity.

The tools

ToolWhat it isFor what
Chīshi (筋力棒)stone or concrete on a handle, loaded at one endleverage work for wrist, forearm and shoulder along blocking paths
Ishi-sashi (石鎖)stone padlock with a handle, akin to a kettlebellblocking and striking paths under load, shoulder and back
Nigiri game (握り甕)clay jars gripped at the rim, often filledgrip strength with the fingertips; carried standing and walking
Kongōken (金剛圏)heavy oval iron ringwhole-body work, lifting, turning, partner drills
Tan (担)axle with weights at both endstwo-handed work, the closest thing to a barbell
Makiage kigu (巻上げ器具)roller with cord and weightwinding up and down for forearm and wrist
Tetsu geta (鉄下駄)iron sandalsleg work, kicks under added load
Makiwaratapered striking postpunching structure and feedback

The principle: the grip is part of the exercise

The difference from a dumbbell sits at the hand.

A chīshi is loaded at one end. The weight sits at the end of a handle, far from the hand, and creates a torque the wrist must counter continuously. On a dumbbell the weight lies symmetrically about the hand; that torque does not exist. Perform a blocking movement with the chīshi and you load exactly the structure that has to stabilise that movement when it matters.

The nigiri game take this to the limit. They are carried not by a handle but by the rim of the jar — with the fingertips, with nothing to hook onto. You cannot lift them by holding on to the tool; you have to hold them. That is precisely the demand of gripping an opponent, and precisely what no knurled barbell provides, since the knurling carries part of the load for the hand.

The price of this specificity is that the load is hard to increase. A stone weighs what it weighs; a set of plates can be planned in two-kilo steps. For pure strength development the barbell is therefore the better tool, and this should be conceded without hedging. The advantage of hojo undo lies elsewhere: in the kind of grip, the angle and the torque.

The kongōken — proof that the tradition was open

The most revealing tool is the most recent one.

The kongōken, a heavy oval iron ring, belongs today as a matter of course to the Gōjū-ryū canon and is readily presented as an ancient Okinawan training device. It is nothing of the sort. Miyagi Chōjun (1888–1953) encountered it in Hawaii in the 1930s, where wrestlers trained with it. He brought the idea home and had an oval version made, because that shape better matches a human body.

This is remarkable for two reasons. First, it dates an element of the “traditional” canon to within a decade. Second, it shows how the tradition actually worked: a leading master saw a useful device in a foreign sport and adopted it. No secret, no lineage, no scroll — a journey and a good eye.

Anyone defending hojo undo as a closed body of practice that must not be touched is defending something its own history refutes.

What modern strength training does better — and what it does not

Set out honestly:

The barbell wins on plannable load progression, on maximal strength development, on comparability and record-keeping. If you want to get stronger, squats and deadlifts will take you there faster and more measurably than stone weights.

Hojo undo wins on grip strength without anything to hook onto, on one-sided loading with torque, and on transfer to a specific movement path. A walk across the yard with nigiri game is hard to reproduce on machines.

The sensible answer is therefore not an either/or. It is: base strength with the barbell, the specific work with the old tools.

Connections to other martial arts

  • Makiwara — the same principle on the striking side: the device tests the movement rather than loading a muscle
  • Gōjū-ryū — the style in which hojo undo is most fully preserved; Miyagi Chōjun assembled the canon
  • Uechi-ryū — the second Okinawan line with pronounced equipment training
  • Shaolin conditioning — the Chinese parallel, from whose orbit the Okinawan tools came
  • Zurkhaneh — the Persian equivalent with clubs and shield; the same idea, arrived at independently

Today

Hojo undo is practised throughout Okinawan-oriented schools and is a niche outside them. Chīshi and nigiri game can be made at home with little effort — concrete, a broom handle, two clay jars — which suits the matter: the tools were never sporting goods but implements made from whatever was lying around the yard.

For beginners the same applies as with the makiwara: the load falls on places that have nothing to withstand in everyday life — fingertips, wrist, elbow at full extension. Start with the weight you can lift rather than the weight you can hold, and you will earn a tendon irritation that costs you months.

Author: Redaktion ·August 2026
← All Training & Techniken