On the mat, legal Shime-waza (strangle) can be used in certain age groups. Typically, ages 13 years and above are allowed to use Shime-waza in their matches. Consult the specific tournament rules for clarification.
Ippon is awarded when contestants are on the mat and one submits from an effective strangle (Shime-waza)
The following examples illustrate Shime-waza techniques and submissions.