| I: | “Will,” “mind,” or “intent.” | |
| Iai: | “Swordplay.” A sword exercise employing a series of thrusting and cutting techniques while drawing and returning the blade. | |
| Iaido: | “Way of the sword.” The modern art of drawing the samurai sword from its scabbard. | |
| Ibuki: | “Breath control.” Isotonic breathing exercises based on dynamic tension principles practiced in conjunction with, and also separate to, the execution of karate techniques. | |
| In ibuki: | “Passive” or “internal breathing.” A soft-but-firm type of breathing that stems from deep in the abdomen. It is common to many different martial arts. | |
| Ippon-seoi-nage: | One arm shoulder (back carry) throw. | |
| Isshin ryu: | “One-heart method.” A hybrid form of unarmed combat based on several Okinawan karate systems, founded by Tatsuo Shimabuku in 1954. | |
| Itosu: | Karate Master who began teaching Karate-do to Okinawan school children in 1902 Okinawa. |
