Judo Level 4: Kata Ha Jime — The controlled arm distinguishes the technique

片羽絞, kata-ha-jime, is a strangle technique. The single-wing image helps remember the one-arm control.

Kodokan describes one hand on the collar and the other arm passing under the armpit to control the partner’s arm. Read those different roles rather than treating every arm as simply adding strangle force.

Kata-ha-jime combines collar use with control of one of uke's arms. Kodokan describes the other arm passing beneath the armpit and raising uke's arm, a relationship that distinguishes it from okuri-eri-jime.

Okuri Eri Jime emphasizes its two collar grips; one-arm control distinguishes Kata Ha Jime. Rear position alone does not identify the technique.

The image of a single wing does not turn shoulder twisting into the goal. Have an instructor check the arm arrangement, because rear footage can conceal much of the elbow and shoulder alignment.

Have an instructor check arm and collar placement without pressure. Do not force the partner’s arm beyond its movement range. Agree on stop signals and release immediately.

The Level here refers to the IMAC Dojo curriculum. Use the article and clips to prepare questions and review them with your instructor. Practical training needs a suitable partner, space and controlled conditions.

Pause during positioning and identify which hand works with the collar and which arm controls uke's arm. If unclear, preserve the question rather than forcing a partner's arm upward to match the picture.