In Judo, an ippon is awarded when one of the Judoka accomplishes one of the following:
- A throw ending with an opponent largely on his/her back, demonstrating full control, having such amplitude that the feet of the player receiving the action leave the tatami (the contest mat); the back does not necessarily have to touch, it is the exposure that is considered by the referees. Landing in a bridge will score Ippon, even though there was no direct contact of the shoulder blades with the mat.
- Pinning an opponent with his/her back touching the mat for 25 seconds; The contestant being held may not have any control of any part of the attacking player's body for the pin to be scored. This differs from a wrestling pin as if the person that has their back facing the mat has their legs wrapped around any part of the attacking player's body (for example guard), the pin will not be scored.
- Applying such a hold to the arm, above the wrist but beneath the shoulder, that causes the player receiving the action to submit. (For example an "elbow lever" or armbar.)
- Strangling the opponent to induce a submission; a strangle can be induced with the uniform, arms, legs or with the opponent's own shoulder muscle. If the strangulation doesn't end in a submission, and rather the opponent falls unconscious, ippon is awarded as well.