Omote‑waza: Technique which goes forward or to uke’s front.
Ura‑waza: Technique which goes around or behind uke.
Tenkan: Turning, a subset of ura‑waza.
NOTE: The whole name of a technique in Japanese is formed by the word for the attack, then the technique, then the direction or variation.
Attack Technique Direction
shomen‑uchi ikkyo omote
katate‑dori shiho‑nage ura