Oi zuki

Tsuki
A successful tsuki in Karate.
Japanese name
Kanji	突き
Hiragana	つき
Transcriptions Revised Hepburn tsuki

Tsuki (突き^?) is the Japanese word for "thrust", coming from the verb tsuku (突く^?), meaning "to thrust". The second syllable is accented, with Japanese's unvoiced vowels making it pronounced almost like "ski" (but preceded by a "t" sound). In Japanese martial arts and Okinawan martial arts, tsuki is used to refer to various thrusting techniques.

In karate and its variants, the term tsuki is used as a part of a compound word for any one of a variety of thrusting techniques (usually punches). It is never used as a stand-alone term to describe a discrete technique. For example, gyaku seiken chudan-tsuki, more commonly referred to as chudan-tsuki (段突), refers to a mid-level (chudan) punch (tsuki) executed with the rear (gyaku) arm. Note that in a compound word, where tsuki does not come first, its pronunciation and writing changes slightly due to rendaku, and it is pronounced as "zuki" (and is sometimes transliterated that way).

The choku-tsuki (直突き) -- straight punch—is a basic karate technique. It is performed by closing the hand in a fist. Target contact is made with the first two knuckles of the fore-fist, with the fist rotated slightly, both externally and downwards, so as to align the wrist directly behind the first two knuckles. For a right choku-tsuki, the right fist is chambered at a preparatory position, at the hips or by the ribs, with the palm side of the fist pointed upwards. At the same time, the left arm is extended in front of the left hip. To perform the choku-tsuki technique, the right fist is thrust forward in a direct path toward the target, with the elbow directly behind the fist and tracing the fist's path. At the same time, the left fist is pulled back to a chambered position at the hip or at the rib cage. The extending fist remains palm up until the last two inches of the punch, during which it rotates to face down. The elbow remains pointed down, since allowing the elbow to rotate to the side or upwards exposes it to injury from either self-inflicted hyperextension, or from a stiff block by the opponent. Ideally, the fist contacts the target in a vertical to a 45 degree rotated position, with the rest of the fist's rotation taking place following initial contact.