 is the Japanese name of a movement practiced in several martial arts. It is a 180 degree pivot to the rear, on the lead foot. That is, if the left foot is forward, the pivot is clockwise, and if the right foot is forward, the pivot is counter-clockwise.
Aikido.
Tenkan is a very common foot move in aikido. Strategically, tenkan is most often used to place "tori" back-to-back with "uke". A few attacks - techniques that commonly begin by executing tenkan include: "shōmen'uchi" - "kaitennage"; "katate-dori" - "shihōnage"; and "morote-dori" - "kokyūnage".
Some styles of aikido practice six basic "ashi sabaki" (stepping/footwork) movements, of which tenkan is one.
Those six basic stepping techniques are:
Judo.
Tenkan is a foot move used in judo.
References.
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