Martial Arts Glossary

Ichi (一): One. The first cardinal number in the Japanese Sino-Japanese numerical system. Used extensively in daily counting, mathematical expressions, base numerical combinations, and for issuing the initial pacing command during traditional martial arts line drills (Kihon) and warm-ups.

Ippon Kumite (一本組手), translated as "One-Step Sparring," is a foundational pre-arranged sparring drill practiced extensively in traditional karate, particularly within Shotokan.

Ippon-ken (一本拳), translated as "One-Knuckle Fist" or "Single-Knuckle Fist," is a specialized open/semi-open hand strike in traditional karate designed to focus impact power into a small, concentrated contact area.

Irimi (入り身), translated as "Entering" or "Entering Body," is a foundational martial arts principle and tactical movement concept centered on entering directly into an opponent's attack line or close-quarters space.