| Uchi: | Strike. | |
| Uchi deshi: | “Apprentice.” An old Japanese practice where a student was apprenticed to a martial arts master in order to become an instructor in turn. | |
| Uchi-mata: | Inner thigh. Judo foot technique. | |
| Uchi-mata-gaeshi: | Inner thigh counter. Judo foot technique. | |
| Uchi-mata-sukashi: | Inner thigh reversal hand technique. | |
| Ude: | Forearm or arm. | |
| Uechi ryu: | An Okinawan style of karate founded by Kanbum Uechi. It is characterized by linear patterns and forceful breathing. | |
| Uke: | “Receiver.” The partner upon whom the technique is executed. | |
| Ukemi: | “Breakfalling.” The art of using shock-dispersing action such as rolls and breakfalls to avoid injury when falling. | |
| Uke-waza: | Counter moves. | |
| Uki: | Floating | |
| Uki-goshi: | Floating hip, hip technique. | |
| Uki-otoshi: | Floating drop. | |
| Undong: | Exercise. | |
| Ura: | “Reverse,” “hidding,” or “rear.” | |
| Uraken: | Reverse fist. | |
| Ura zuki: | Reverse punch. | |
| Ushiro: | “Back,” “rear,” or “behind.” | |
| Utsu: | To strike or to hit. | |
| Ushiro-goshi: | rear (back) hip. Judo hip technique. | |
| Utsuri-goshi: | Switching hip. Judo hip technique. | |
| Uye: | “Up” or “upward.” |
