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Sune (脛)

Introduction

Sune (脛) refers to the shin.

In Kyokushin karate, sune does not constitute a primary striking surface in kihon, but functions as an important contact and blocking surface in kumite and in techniques where leg meets leg.

Definition

Sune (脛)
The front part of the lower leg between the knee and the foot.

Terminology

Japanese: 脛
Romaji: sune
English: shin

Position in the system

Sune does not constitute a defined main striking surface (atari-bu) in Kyokushin’s basic system.

Instead, it functions as:

  • blocking surface
  • contact point
  • functional surface in kumite

Structure / Form

Starting point

  • the leg is kept stable
  • the knee and foot are kept in line

Contact zone

  • the front part of the shin is used as the contact point
  • the contact is directed through angle and timing

Foot and knee

  • the ankle is kept stable
  • the structure of the leg must not collapse in the contact

Striking surface / contact point

Primary contact

  • the front part of the shin

Secondary contact (should be avoided)

  • knee joint
  • ankle
  • foot

Basic principles

Structure

The leg is kept stable so that the shin can take or give contact without the angle breaking.

Body connection

Power is transferred through the body to the contact point.

English:
ground → supporting leg → hip → torso → leg → contact point

Japanese / romaji:
jimen (地面) → sasae-ashi (支え足) → koshi (腰) → dōtai (胴体) → ashi (足) → sesshokuten (接触点)

Timing

Sune functions best when the contact occurs at the right moment and with the right angle.

Execution

Movement

  • the movement is kept compact
  • the leg is brought in along a controlled path
  • the contact is adapted according to technique and distance

Contact

  • contact occurs with the front part of the shin
  • the angle determines whether the technique blocks, deflects, or breaks the line of the opponent’s kick

Retraction

  • the leg is kept ready for immediate follow-up
  • balance is regained directly after contact

Use

Sune is used, among other things, in:

  • sune-uke (脛受け)
  • mawashi-sune-uke
  • contact and blocking against mawashi geri gedan (回し蹴り下段)
  • leg clashes in kumite

In these situations, sune functions as an active contact and blocking surface.

Training

Sune is trained through:

  • partner exercises
  • controlled contact training
  • technical timing training

Focus:

  • correct angle
  • stable structure
  • controlled contact
  • gradual conditioning

Common errors

Unstable structure

  • reduces effectiveness
  • increases the risk of injury

Incorrect angle at contact

  • the block works less well
  • the force is received incorrectly

Too early or late timing

  • the contact loses its function
  • the follow-up is impaired

Collapse in the knee or ankle

  • the line of the leg breaks
  • the technique loses stability

Summary

Sune (脛) refers to the shin and is used mainly as a blocking and contact point in Kyokushin karate.

It:

  • is not a primary striking surface in kihon
  • is used actively in sune-uke and in kumite
  • requires correct angle, timing, and stable structure
  • is developed through gradual and controlled training