Teisoku (底足)

Introduction

Teisoku (底足) refers to the arch on the underside of the foot. In Kyokushin it is not a central primary kihon striking surface on the same level as chūsoku, sokutō, haisoku or kakato, but it has specialized contact and blocking functions.

Definition

The arch of the foot acts as a controlled contact, blocking or specialized striking surface.

Terminology

Japanese: 底足
Romaji: teisoku
English: arch of the foot

System position

Teisoku functions mainly as:

• a contact point
• a blocking surface
• a specialized surface in particular technical applications

Structure / Form

• expose the arch while keeping the foot controlled
• keep the toes out of the contact
• stabilize the ankle and adapt the foot angle to the function of the technique

Contact surface

Primary: arch on the underside of the foot.
Avoid unintended contact with the toes, heel or outer edge.

Use

Teisoku appears in ashi barai, specific foot blocks and some circular applications depending on angle and distance.

Training

Use balance work, controlled technique drills and foot-position exercises. Focus on stability, angle, control and precision.

Common errors

• treating teisoku as the entire sole
• unstable foot structure
• incorrect foot angle or contact area

Summary

Teisoku (底足) is the arch of the foot used primarily as a specialized contact and blocking surface.