Straight punch - Seiken/kento tsuki

Overview

The most basic tool of the martial artist, the straight punch is versatile, powerful, and natural to use. It can be used to disable, or to kill, making it a good first choice weapon whatever the situation. It can also be used upside down as a short punch or uppercut.

Compare to: Teisho

Striking targets

Any part of the body, from the right angle.

Used in these katas
Taikyoku shodan, Taikyoku nidan, Saifa, Bassai Dai, Seiunchin, Empi, Sanseru, Sepai, Hangetsu, Kankudai, Karurunfa,

Technique

Close the hand into a tight fist, with the thumb tucked out of the way. Align the wrist so that the bones are straight in both axes. Strike with the front two knuckles.

Strengths

Extremely powerful. Can be used to hold opponent at bay or deliver a sharp shock. Can be used to any body part, from almost any angle, from almost any position.

Weaknesses

Easy for the untrained user to break their hand or wrist. Ideally needs knuckle conditioning or technique will hurt you.