Chūsoku (中足)

Introduction

Chūsoku (中足) is the primary striking surface of the foot in Kyokushin karate. It is used in fundamental kicks, with contact made by the ball of the foot beneath the toes.

Definition

The ball of the foot forms the contact surface while the toes are pulled back and protected.

Terminology

Japanese: 中足
Romaji: chūsoku
English: ball of the foot

Structure / Form

• pull the toes back as far as practical
• expose the ball of the foot
• keep the ankle stable and the foot structurally aligned

Striking surface

Primary: ball of the foot under the toes.
Avoid striking with the toes or mid-foot.

Basic principles

Maintain a compact foot structure and transfer force through:

ground → supporting leg → hips → trunk → kicking leg → foot → striking surface

Use kime at impact and recover immediately.

Use

Chūsoku is used in techniques including mae geri, jōdan mae geri and mawashi geri.

Training

Train through kihon, controlled kicks and precision work against suitable targets. Focus on retracted toes, a stable ankle and a clear impact line.

Common errors

• striking with the toes
• insufficient toe retraction
• unstable ankle
• poor retraction after impact

Summary

Chūsoku (中足) uses the ball of the foot with the toes pulled safely back and the ankle stabilized.